Umm, why not just carry it? Unless you are going to a state that does not honor your CCW permit.
Edit: Just reread your op. I missed the waterpark thing. Yeah keep it in the lock box in your car and keep the lock box out of sight. I also say do not keep it in your hotel. You do not want a maid coming in and finding your pistol and deciding it would look better in their house.
Brain (Use this one the most)