Take a wad of $1s, $5s, and $10s to tip with. The workers who treat you so well don't get paid squat, and it is a must to show them that you appreciate their efforts. Also take lip balm with SPF15 or more. Burned lips make it hard to appreciate certain late nite activities. On that note, be careful of using a bite of lime after a shot of tequila and then heading into the sun. (My wife and I found out in Jan that the lime juice accelerates the suns effect) I'm not saying don't do it, just wash it off with another drink asap.
Yes, straws. As of last year straws became very hard to come by. Bring a big bag and you'll instantly make a lot of friends around the pool. D