I rarely go to car shows. I often go to car meets. Why?
At car shows you are restricted. If people are in the foreground/background you have to wait, even then you may not get a clear shot and As the cars are pre placed you have no say on how they are positioned. You will have no distance as cars are ofen aligned in rows. That leads to my biggest issue: ropes. The cars will often be cordoned off
So why do I prefer photographing at car meets. Well, I get to meet the owners, ask questions and ask if they will park in a desirable location in a position more suitable allowing me to take control