I'm pretty low maintenance when I'm lucky enough to hit the beach or the pool in the summertime, requiring only some sunscreen, chapstick, and a book — but I cannot leave my iPhone behind (um, I do realize that this may make me high maintenance, but I'm ignoring that).
I need my lifeline to the outside world as well as my iPod, plus I know it's not that weird — celebrities are always photographed using their cell phones while poolside. Just yesterday Ashley Tisdale was caught in a skimpy bikini, checking a BlackBerry (um, I do realize that rationalizing that something is normal because a celebrity does it is not a good argument, but I'm ignoring that).
In any case, our dependence on gadgets has made their presence at the beach or poolside a regular occurrence (just don't drop it in). Do you take and use your cell phone when you go to the beach, pool, or lake?