Honestly, I don't know whether a 2wd could make it. Maybe, maybe not. None of us have been out there before. That's kind of what this first trip is for, to check out the area and see if it can be done solo, or in 2wd, etc. At the bare minimum, I would say don't go solo unless you have a reliable winch, sand anchor or Pull Pal, Hi-lift jack or Bushranger X-jack, a shovel, and possibly sand ladders, and a decent supply of food and water. All of those things are of course, just in case of the worst case scenario, and I hope we don't have to use any of it. That's one of the reasons I organized this first run to have multiple vehicles. I don't have a hi-lift, but I know Johann does. James has a winch. We all have solid recovery points to latch onto. By pooling resources and know-how, this tiny little expedition becomes that much safer. We may not end up needing any of them, but better to have them and not need them, etc.
But, don't let that discourage you. It is, after all, mostly beach driving, which I do a lot of. My last Xterra was 2wd and it did very well in sand, and I've yet to actually need my 4wd on the beach (but of course I've used it!). We'd love to have you along if you're willing to try. You'd be surprised at the trails some guys conquer in 2wd Xterras. If you get stuck, we can get you unstuck.