it will be very manageable up to the 17th
from the 18th of may on to the end of the month, expect crowds to get heavier. It won't be anything like springbreak mayhem, but the first part of May will see lower crowds than the second part.
The only time in May when its horrible busy is over Memorial Weekend,so expect thurs-tues to be busy,especially at HS as it coincides with Starwars Weekend too.Saying that its all easily avoided with a bit of good planning.We tend to do water parks and resort days at that time