I would try Pioneer RV Park on Mustang Island, just south of Port Aransas or Mustang Island State Park, just south of Pioneer. It's a short walk to the beach and surf fishing. Just a tip: the salt water fishing license will cost you about $65.00, but if you do your surf fishing within the boundaries of the State Park, you don't need a license. You will, however, need a state park pass for about the same amount, but if you use the Texas State Park campgrounds, you may find that a more economical way to go.