It may be a bit of a cultural difference for you but I think you will find most of Texas to be friendly and good places to raise kids.
Round Rock is 63 miles from Ft. Hood and I'm sure there are nice places to live closer to than that.
If you want beach front, look at the numerous developments around Belton Lake, its 84% full,
or
Stillhouse Hollow Lake, 92% full, even in this drought. The worst of the TX drought has been south of this area.
Or Salado, Texas, just a little further south, its a very nice area.