If you're curious, I got on the first train of the day on Steel Vengeance on this past Sunday WITHOUT even using Fast Lane. It's the only way I know of getting onto the ride, particularly on the first train, without Fast Lane and in well under an hour, specifically on a weekend.
Protips on how to do this:
1. You MUST have Gold/Platinum/Early Entry AND you must enter in through the Main Gate. This is the only way you can get in at the earliest times. They usually open the main gate around 8:45am so you want to already parked and be in the security line by 8:30am-ish.
2. Also, obviously, you have to go straight back to Steel Vengeance right away using the Gemini Midway. I DO recommend using the restrooms near Top Thrill or the ones near Gemini on the way to the back unless you're in a group. You might have a little bit of time to hop on Magnum XL-200 on the way since it usually opens at 9am sharp, but you can skip it. By the time you get to Steel Vengeance, there should be less than a dozen people sitting around waiting if you've been a fast walker.
NOTE: If you're NOT a season passholder, I recommend going in through the Park's Magnum entrance (via the Resort Drive) on the northeast end of the park and get in that gate's line by 9:15am. They usually will open the Magnum gate at around 9:45am-ish. You obviously won't get the first Steel Vengeance train, and there'll probably still be about 150+ people already in the line before you get there, BUT it'll be better using this entrance versus the Main Entrance that the majority of the people will use at 10am.
3. Now, the trick is, knowing that the Fast Lane Plus lanes and the Steel Vengeance ride itself doesn't even open until 10am (actually more like 10:15am due to the early testing runs). So, you really want to stay right there in line as soon as you can, no matter if some rides like Maverick, Raptor, Magnum, and Valravn are running early as early as 9am. This is because the big line for Steel Vengeance will start around 9:30am and if you don't get in line right then, there will easily be 400+ people in line by 10:15am when they start letting everyone in. So, even if you have to wait at the Steel Vengeance entrance at 9:15am, a 45 min wait is worth it versus the 2 hour wait if you leave to ride something else first and come back later after 10am.
4. Also, they will open both the general line AND the Fast Lane Plus line at the same time as well. At a certain point inside the queue, these two lines merge into one. However, the general line has a much longer walk path before it gets to the merged line, so I'd recommend running not walking through the general line path. If you're quick enough, you can actually BEAT the Fast Lane Plus crowd to the front of the train line!
5. Also, if you get there early enough at 9am, you'll be able to sit down and wait on the raised concrete just to the side of the entrance. No having to stand up for hours waiting!
6. Lastly, USE-THE-OUTSIDE-LOCKERS. At around 9:45am, while you're waiting for Steel Vengeance to open, have someone save your spot in line and go use the $2 lockers across from the entrance and put everything in your pockets inside (including glasses, hats, etc.). Trust me, 8 or 9 times out of 10, you WILL lose your spot in line if you use the free lockers inside.
Enjoy!