Bringing toddler to water park?

I took my 3 kids with my husband to a water park when we went on vacation. I have a 7 year old son and 2.5 year old twin girls and they had a ball. I would do it again for sure. (Then again they love swimming so only take your son if he likes swimming otherwise a waste) Also bring more swim diapers than you think you will need just in case... some extra dry towels in case it gets cold (you know how tots can be) bring band aids and neosporin just in case and some water wings is all I can think of.. have fun!