I thought I'd just give a list of things you should bring:
1) Collared Shirt (this is required at the golf course)
2) Water/Gatorade/Etc. and lots of it
3) Change of clothes (especially after beach volleyball; nobody wants to sand-chafe during basketball)
4) Snacks/Lunch (if you don't want to grab something unhealthy)
5) All the equipment listed (we will use the best stuff, so just bring it even if its crappy): softballs, bats, gloves, bases, volleyballs, basketballs, golf clubs, portable iPod player, and anything else you think would be a good edition
6) Cash for Golf and Bowling
If anyone thinks there should be anything added to this please add to the comments.