Wille, I have never been but as a former vendor of ph balanced all natural dog shampoos I know that some of the licensed vendors there or where ever do this a form of their only "Livelyhood"! I think that the park gets part of the monies earned through the vendors as a way to keep the park going? Not sure if that helps ya
But I would check with them I think that I heard somewhere that if they catch ya ....you have to leave???
Peace and good luck!