1- Since school wont be out yet, its not that bad to go on a saturday. Sundays are always the safe choice though if you wanna avoid huge crowds.
2- Definately. Most of the rides will be walkons or 2 ride waits. Most are crap too. Like the pirate ship (bateau pirate). There are maybe a couple of non coaster rides worth riding. I'll name them to you when I tell you which way to go around the park.
3- Not more then usual. (which may or may not be crowded depending on the weather)
4- Okay here's what I always do. From the entrance you take a left and head straight onto the first coaster you see. Cobra (green standup) The wait will be 5 minutes tops. You do that and then head straight to the coaster next to it Vampire (BTR clone). Sit in front for the best sensations). Now its time to take a U TURN and head straight onto Monstre (wooden). Make sure you sit in the back for the most airtime. If you wanna redo it in the dark later at night, the front seat is the BEST!!
Now there are two coasters right next to Monstre. Boomerang and Super Manege. They both suck. Especially Super Manege one of the rougest pieces of crap I've ever seen. When you're done you can always ride the flat next to Super Manege called Manitou. Really nice! Then head on to Goliath and MAKE SURE you ride it in the very last row. It is WAY different then any other row on the coaster. Trust me.
Now you can go ride the kiddie coaster to the left of Goliath called Dragon (expect huge crowds for this one if its not past 5).
Other rides you should consider are Orbite (great airtime) and Vertigo.
5- Yes and you will regret it if you mess around with the bycicle thing. Sit wisely or else you're in for one hell of a ride! (and I dont mean that as a good thing)
Best of all ENJOY and write back to me with a review!!