your're right its not disney but actually there are a ton of things to do for the family. the westin resort (where i stayed part of the time) offers recreation activites until 10pm i believe for families. there is horseback riding, parasailing, dolphin watching, jet skiing, water skiing, boogie boarding, skim boarding and a bunch of other things. i am planning on going back down in december.
p.s. the heat and humidity in the south in july is INSANE