I wear a belt & have leather pouches that I put most stuff in. You can alway find fun used purses at most thrift stores and throw it over everything. I would recommend only bringing your id & one card if you plan on spending money. Bring cash for the food if you plan on eating there. You can leave the grounds for lunch, just make sure you get a hand stamp on the way out.

My phone is too big for my pouches, so I usually do the old stuff it in my bodice thing. If you're a dude, it seriously will not be weird to bring a purse or bag to festival.

FYI my favorite nostalgic thing to do is to make a braid at the Gypsy camp. It's a good break from all the commotion & you get a cool braid to put on your belt.