I totally agree with Robb and Elissa. I'll try to help, but a lot of my "helping" is going to be trying to convince you to re-think your plan. I'll break this down the best I can.Six Flags America
Honestly... go ahead and death march this park. If you want to ride nothing but coasters and then bail then go for it. You could even try to combine this with Kings Dominion or go the same day you leave from Greensboro, but beware the Washington DC traffic if you do that as it can really screw you up and the EZ Pass Express Lanes won't be heading your way in the afternoon if it's a weekday. Even if you don't plan to use them, this will f*ck you up royally. If you leave at night after work and get there at park open feel free to ride the coasters and bail and get to Great Adventure early.
PS: You sound like a total credit whore so you might be interested in this... I won't recommend kiddy credits because that's pathetic, but on the way to Great Adventure if you get off of exit 4 on the turnpike there's a wild mouse literally right there (like RIGHT THERE, like 2 minutes out of your way round trip) at Funplex Mount Laurel
. Clementon is nearby too but it's expensive and it sucks.Six Flags Great Adventure
If you're only there for one day budget for Flash Pass. Personally though I would plan to be there the evening of the day you go to Six Flags America and maybe even the morning of the day you go to Dorney. This is a coaster park mostly, but don't miss the Safari or Zumanjaro. They have other cool rides too like Justice League (have you ridden one?), Houdini, the Skyway from the world's fair and America's only remaining parachute drop.Dorney Park
It's Dorney, so nobody would be offended if you hit this place quick and bail BUT if you don't ride Demon Drop and Thunder Creek Mountain then you're skipping 2 of the 3 best rides in the park. Ride Steel Force in row one so it feels like you're riding a roller coaster and not sitting on your couch at home for the duration of the ride. Be sure to check out their new chicken tender stand next year. It's going to be amazing.Knoebels
If you're the kind of person that wants to visit Knoebels (the greatest place in the history of the world) just to ride the coasters and leave then you should spend most of the day at Dorney riding Steel Force like a loser because that's what you deserve.
All (sort of) kidding aside, no. Knoebels is a full day park. Go on a hand stamp day. Ride EVERYTHING. Eat EVERYTHING. Here's a trip report I just wrote if you need inspiration
. Here's a pierogie map
. Knoebels has some of the best "park food" of any park in America, they have the best carousel in America (and you can catch brass ringy dingy ding-a-ling dings), they have 2 of the best classic dark rides in the world, they have THE BEST bumper cars in the world, they have THE BEST flyers in the world, they have a great flume, one of the better drop towers in America, Downdraft which is wonderful, a great Paratrooper, possibly the only Satellite and Looper rides in America, an awesome slide that totally shouldn't exist in America, and a 1001 Nachts ride that's apparently so good that some crazy b*tch married it
. It's a full day park, if you're just going for the coasters you're completely missing the point.Hersheypark
I don't really have any tips here other than to ride Coal Cracker and check out the Chocolate Tour.Kennywood*
Who the f*ck would go to Kennywood and only ride coasters? WTF? I feel the same way about this one as I do about the Knoebels one. Maybe you can afford to get there a little late and leave a little early so you're not death marching from Knoebels and to Cedar Point but spend most of the day here.Cedar Point
Budget for Fastlane, MAKE SURE you get there for Early Entry (since you have a Platinum Pass). King's Island
This park often closes the last week of August mid-week so watch that when planning this trip. This is another park that offers Early Entry, though not on the same scale that Cedar Point does (it's generally on 2 major rides, check the website for details as they switch them throughout the year). You'll never be able to get there at a reasonable time from Cedar Point if you stay until close, and you'll need to if you're trying to cram it into one day. Personally I'd spend a full day at Cedar Point, then stay near the park and go back to Cedar Point the next morning for early entry to get more rides in on Steel Vengeance, Maverick, Millennium Force, Valravn and/or Gatekeeper and anything you might have missed. Leave whenever you want and head to Kings Island for some rides that night and spend the entire next day. If you can, try to go to Kings Island on a day with a 10:00 close because Beast night rides are amazing. This plan costs an extra day but makes your days at Kings Island and Cedar Point much less stressful and depending on crowd levels might save you money on Fastlane at one or both of the parks since you now have extra time.Kentucky Kingdom
This is not a full day park at all, so you have a few options with this one. I know between the drive from Kings Island and the drive to Dollywood you'll have about 6 hours of driving and I've factored that in but I would either...
1) Spend the morning at Kings Island and go for early entry to get more rides in.
2) Stop at Cincinatti's Coney Island on the way to Kentucky Kingdom. It's cheap and they have a coaster but more importantly they have fun flat rides and a Rock O Plane. They also open late (usually around 11am or noon) and the idea of sleeping in after so many crazy days might be pretty appealing by this point). You can do Kentucky Kingdom in like 2-3 hours if you're not doing the waterpark and this is a park where you're not wrong at all to just hit the coasters and bail.
3) Go to Kentucky Kingdom early and bail early so you can get to Pigeon Forge and Gatlinburg early and check out all of the awesome local attractions.
By the way, Kentucky Kingdom has an out of state special
that includes 2 days admission and free soda. You don't need 2 days admission, but it's infinitely cheaper than actually buying a regular one day pass. You need to buy it at the gate and present your North Carolina drivers license.Dollywood
If you seriously go to Dollywood and only do coasters you should be ashamed of yourself. I normally hate shows, but their shows are amazing. See the shows. Also, ride Slidewinder, Daredevil Falls, the train, Barnstormer and Drop Line.
I have no advice for the last two. You probably go to Carowinds all the time so you don't need tips and I've never been to SFOG.
My only other advice is to budget a lot of time to get through northern Virginia because DC traffic is hell on earth and if you don't already have one, get an EZ Pass. You can also get an NC Quickpass since it has interoperability with EZ Pass and (if you ever make a road trip down south), Sun Pass.