Take a bring enough water, food and stuff for yourself. Don't rely on getting anything at the game (sometimes it's just too busy...othertimes it's rot-gut hotdogs that'll give you the shits). Throw a case of water and a roll of TP in the trunk...trust me. Pass out the water at the end...guys will really appreciate it (don't share the TP....LOL).
A bag of bbs, loader and a little screwdriver kit is easy to pack in a knapsack. Either take it with you....or leave it at base. 99% of the time we end up carrying everything around all day with us...not a big deal.