I went there once about 35 years ago. We had a borrowed Ford Bronco. I remember having to carry all kinds of things (shovel, jack, 2x8x6) in case we got stuck. My dad was rather adventurous and we eventually got suck. Dug in to the hub. Spent quite a while trying to dig out until someone came along and pulled us out.
This was late spring/early summer. I remember the damn sand fleas and horse flies too.
Hope you have fun out there. If you learn of the requirements for traveling out on the sand, can you post them here for others to learn from?