with regards to the water parks, I would check the weather channel whilst out there and go to the water park on the day that is forcast to be warmest..there will defo be a warm period ..I have never had a whole two weeks of cold/rain
I never do an itinerary i just do a plan with the times of fireworks/parades special days EMHs etc then I have a printout with busy days.. then when we get there we can plan around the weather easily..