we are traveling in Sep with our 4 kids (9,7,4, and 20 mo). We are staying at blt. It will be 6 full days excluding our travel days. How many days should we intend to spend at each park? I don’t think we want to mess with the water parks or anything extra than the 4 main parks? It’s $330 extra to do park hopper. Should we do that? Thanks!!