I found it annoying when, during a September visit to the Kalahari indoor park in Wisconsin Dells, renting a locker proved to be a pain (we couldn't bill the locker to our room the way we would a hotel-restaurant meal). The workers instead told us to just leave our stuff, including our room keys, on a chair inside--"Everyone does it," they said. Anyway, I was excited to learn that KeyLime Cove (a new waterpark resort in Gurnee, Ill., that opens on February 29) will have radio-frequency identification wristband technology. That means you don't have to carry a room key or cash (to rent a locker with, say). You just use your wristband. The resort will also take photos of you going down the slides, and ID you by the wristband, so you can look at the pix later. The resort, by the way, is the "brainchild" of Dave Anderson, founder of Rainforest Cafe restaurant chain.