Carrollton is in North Dallas off of I-35, about a 4-5 hour drive from you, depending on where you live in Houston. I am not an outdoors person, so I really can't comment on camping and fishing, but I have heard they are some nice places to go within an hours drive.
The reason you only have DeFalco's is that for some reason, the Houston market has not been good for either home brew or home wine making stores. Several have tried and they have all failed, except DeFalco's. Apparently, it is a real head scratcher for Winexpert and LD Carlson, the distributor.
Here in the DFW area, there are 5 stores where you can buy home brew and home wine making supplies.There used to be more home brew stores, but that market is shrinking, while the home wine making is gowing. I am the newest store and probably the smallest. 2 of the stores focus almost exclusively on home brew. 1 store is a winery/home wine making supply store. Another one is a side business and I focus mainly on home wine makers.