We took a class a 35 foot rv in. There were a number of others there. We found that there was a fine line above which it was soft and below might get salt wash. Ask others before parking. We stayed a week and the sand lost its firmness. Might have drained and softened. Once we understood that plywood strips were what was needed we got out by using the jacks to raise the wheels and putting the plywood under them. Drove to the end of the ply and put more ply in front. Done it before and will probably have to do it again.

It depends. Turning around could have been an issue during high tide. I stayed during a a very high tide over Christmas and New Year. I backed my 34' fifth wheel perpendicular to the beach during low tide into the widest and highest spot I could find with the trailer bumper backed against the sand dunes, which left me about 8' in front of my truck during high-tide. My truck wheels were on solid ground when I parked, but by the time we left 10 days later, tides had dropped significantly, the sand was much softer, but I had no problem getting out laying down 2-layers of the lego-style leveling blocks in front and lower than the bottoms of all 4 truck tires and in 4-low to help ensure I'd get out okay. Once rolling, keep your momentum going w/o spinning the tires. 4-low was for better control not to spin. Probably all over-kill, but it insured I'd get out okay.

No four wheel drive needed. Just pay attention to where others are parked. Watch for the soft sand closer to the dunes and always watch the tides.

You are far better off with 4WD than without it. Depending on tides, turning may be an issue. Lots of big rigs go out there, and I would assume that most are 4WD. Watch out for soft sand and ruts. Beach is spectacular