Unless there is a specific reason I would assume DC would discourage you bringing your own as they try to keep the animals in a "controlled situation". Allowing people to bring their own equipment increases the chances of an outside agent getting into the water etc. They will allow people to use their own suncreams IF you're allergic to certain things in theirs.They will look over whatever it is you want to use and check the contents. I would think if you had an allergy to certain types of rubber they may let you bring your own , but I would expect they would want to sterilize it before you enter into the pools.