Make sure your 4wd is operational. Be prepared to unstick yourself, especially on PINS. Take shovels, pieces of carpet, boards, etc. Air down your tires. You'll need to air back up so take a 12 volt air compressor. Take some Fix-a-flat or slime and plugs in case of a flat. There's lots of debris that washes ashore down there.
Don't drive on the seaweed. As it decomposes it will cause voids in the sand. It's kind of like quicksand and will swallow you quick.
A pair of long 2x8's are helpful. Dig the sand out from in front of the rear tires and lay the board down with the rope toward the front. I drill a hole in one end and tie a rope through the hole. Make the rope plenty long. Tie a loop in the other end and throw it over your trailer hitch. Then when you drive off of the boards you'll drag them until you get to solid sand and can stop to retrieve them.
Watch for nesting sea turtles.
Fishing the surf generally starts getting good once water temps get to 68-72 degrees (usually June).
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Mike
Buda/Port Aransas, TX