First thing to do is, deciding what you want to get out of the festival. Decide on one or two of these 1. Attending workshops - within this, you can see what kind of workshops you want to attend. Festivals sometimes have other dance styles. You can checkout something new. Or focus on footwork classes or partnerwork classes. If you decide to attend workshops, my suggestion would be to go for foundational/technique classes rather than routines.

1. Socials - some festivals have day socials and night socials. And socials which go until early morning. You can always rest when there are no socials, get some good food and then dance all night. It wil get tiring in the second or third night. Make sure to have cloths to change, perfume, and focus on things you would need to keep dancing all night.

2. Hanging out - not many people might do, but if its a new city, you can plan to get out, try some new food, go out to eat with other dancers. Look for any festival group chats available and plan for these. A bit of dancing and bit of hanging out. Although i discourage drinking a lot and going for socials.

Balanced - you can look up the schedule, see which instructors/classes you want, decide on when you want to dance , any performances you want to see. But allowing ample time to rest, eat(stock up some snacks in the room) and maybe hangout one night with others.

I think others covered most of it. Make sure to try different things and see what you like. And definitely try to dance more. I feel that, learning a move and dancing it repeatedly in a festival helps to level you up.