Over stimulation at raves

Hello! I am going to a rave with my roommate later this year, I’ve been to one before and loved everything about it. But she can get a bit overstimulated at times and she is worried about the loud music and people etc ruining her experience. She’s never been to anything like this before. So she just doesn’t know what to expect. She’s been to concerts many times but not to this degree. She’s my best friend and I want her to have a good time. Does anyone have any advice or knowledge from past experiences on self regulation and keeping calm at a place like a rave? I didn’t have any issues so I don’t know how to give her advice. She wants to try to stick it out all day, of course unless it really becomes too much. We’ve talked about sound canceling headphones/earplugs so far. Thanks I’m advance!!!!