I have type 2 diabetes so snacking during a round is critical. The TX heat in summer just sweats the carbs out of me which will cause my glucose to drop like a stone. So I bring: a banana or two which works magic at keeping my glucose up, 4-5 Quaker Chewy bars which have about 20 cards each, two PBJ's (sugar free J) 5-6 bottles of water. Thank god my bag has big pockets!