Bwahahahaha
Redmic, I know your youngest is 4, but why don't you bring some swim diapers to put on her when she goes in the pool and the hot tub? People love swim diapers and that would help out your claim that she's really under 3.
Also, don't forget to get a big ol' leash to string your kids up to in the parks. Just remember to take it off at the restaurants, otherwise they won't be able to chase each other around the buffet table screaming at the top of their lungs.