Oh, you can get your shoes and socks drenched on Dudley, as well. We thought we were soaked when we got off Popete; after Dudley, we had to redefine our definition of "soaked."
As far as what everyone else has said, the most important thing you can do is drink TOO MUCH water. If you don't, you won't realize you're dehydrated until it's way too late to do anything about it (and Summer's not the only time you have to worry about that - I didn't drink enough water in December and ended up sporting a severe headache by dinnertime).
Pick up a decent sized bottle of water and bring it in with you. Keep it refilled. Keep drinking it.