Where you towing? Montauk or Shinacock? I aired down my tires going out of the cut at Montauk. I think you would be OK if you just aired down the truck tires and get a good run.
Montauk is pretty hard on the beach. It's the cut that's the killer.
I just got Sailun tires for my new fifth wheel today. I'm thinking of keeping my old tires and getting steel wheels just for the beach. steel rims are only like 56 bucks a piece.
I think the main reason my other trailer tires failed was because of the weakening of the sidewall after airing down.