I've never been to one, but my only thought is it might help if you could go with one or more friends? I don't really have any friends rn so I get that this isn't a good solution for everyone lol.
Anyway, that's usually what helps me in crowds, having a buffer between me and other people and/or someone to help me steer if needed.
At least, my sister is pretty good at it. I gotta keep an eye out if she's pushing me tho, cause she always underestimates how close my feet/front wheels are to the people (or walls) in front of me xD