I am taking the crowds with a grain of salt
if we do book the buy 4 get 3 promotion( still working on it, we have never gone during peak season, and the prices are scaring me off a tad)
it will be the longest we have ever been there ( longest trip we ever had was 4 days onsite)
but - with that we also have the flexibility to leave the park, go back to the rooms, etc. there would be no pressure or time constraints on us with 7 day passes.
plus, with spring break i am sure the parks will have very long extended hours, and night time is the best time to visit to us. - we are from WI, and going from 20 degrees to 80 is hard. with the sun beating on us all day, we tend to cranky - so night time touring until midnight is OK
* we usally visit in December or February, so it never is "too hot" for us - and the crowds are not there at all, so this will be a new experiance for us.
so, no i am not worried about crowds when we go