I like the steering wheels the best, too, and agree that the papers are distracting. I like the first one a lot, too, but wish there were no people it. I know at these types of shows it's nearly impossible to avoid having people in the shot, and the guy in the foreground kinda works, but the dude drinking a Sprite needs to go. When I've shot at these types of shows, I tend to go for details or angles that avoid people and stickers. Or be obnoxious and just ask people to step out of the frame
Depending on how long the the cars are there, there's potential to not even wait until people leave. Take multiple shots and you can stitch em all together. It's a long process but if the shot's great, it could be worth it.
Thanks for all the comments guys, I agree about the papers in the windows and they were distracting for me as well. They are the registration forms so that the cars can be judged so everyone puts them where they are more visible. People are very touchy when it comes to car shows so I definitely wasnt going to move them myself. As for the people walking around it is impossible to get a shot where there isnt someone photobombing. Thanks again guys