We went to the Outer Banks a couple years back and everone and every beach entrance sign said to ait them down. Well, reading the owners manual it says not to. The owners manual got me stuck! Aired down and no problem.
I also took the trac to the outer banks a few years ago. I didn't take my ST on the beach because it's 2-wheel drive and I'm a wuss. It's neat there though, they have free air everywhere for people who air down to drive on the beaches. Especially near Hatteras.