If I had the money and the connections:
At: Lake Travis State Park, Austin, Texas
Food: BBQ, Beer, Open Bar, sodas, &, water, pretty much whatever.
Music: whatever people play out of their cars/trucks/vehicles.
Entertainment: people mingling, swimming, sports, horseback riding, 4-wheelers, drinkning games, horseshoes, karaoke, poker, dancing, and more mingling with friends all in the confines of a ****ing beautiful state park wilderness.
Lodging: Tents, bungalo's and RV's.