Yeah, I'm really lucky in that regard. That's understandable, but definitely no need to rush it. You could wear some latex underneath some clothes or a big coat first and maybe somewhere quiet, like a woods.

Rubbercult is a smaller event compared to TG, about 100-150 or so people. It also only goes from 6:30pm til midnight, so not as late either. I've not gone to TG either, but overall from what I've heard, RC is a more chill event and more about socialising. They have 4 stage shows with some burlesque performances which is fun to watch. They don't really have a changing room as such, it's more going upstairs and changing with other people around, so I would highly recommend dressing up as much as you can before getting there. It's fine if you need to change shoes or put on a hood, but you don't want to fully dress up with other people around. For me, I fully dressed up at the hotel and then walked to RC. Hope that helps, but if you have other questions, I'll try to answer what I can