R.P.
Hi K.,
I am a Texan who just moved back from Orlando so I understand the beach thing. The beaches in Florida are awesome... plus they have so much touristy things there so coming from what I saw there versus here and what would be neat, I would go to the Hill Country, maybe go camping in New Braunsfel and ride the river on a tube and take in Schliterbaum( I think that is how it is spelled) It is the #1 water park in the United States. It even beat out Disney's Blizzard Beach. I did that once many years ago and we camped too. It was oodles of fun.. There also are cabins too that can be rented in very secluded areas up there. My brother use to do that quite a bit. Maybe go to Trip advisor and see what you can do.. I also have good friends who love going down to San Antonio and stay at a resort there where they can golf... Also San Antonio has the river walk and Alamo. Those are fun things to see.
Good luck in finding the perfect place to go to with your family. :)