Christmas Gift Ideas for LIB Festival-Goers?

Hey Y’all! With Christmas / Hanukkah coming up, I’m looking for gift ideas to share with friends and family that would make Lightning in a Bottle even better. I’m thinking about items in the $25-$150 range that are great for: camping comfort, navigating crowds, walking or dancing all day, getting a good night’s sleep, etc.

What are some must-haves or game-changers you’ve brought to LIB or similar festivals? Thanks for your recommendations!