Shovel
Air compressor
Tire deflator
I suggest going without ARB & Winch, because of the weight.
If you plan to travel alone… To help yourself - a winch would be handy.
You can also get a winch without a ARB
For sand is low weight a big bonus..
Colin Chapman said:
"Simplify, then add lightness."
Colin Chapman
Bigger tires, with tread optimized for sand. Keep the truck as light as possible.
My experience is with 80-series cruisers. Two very similar trucks. Buddy's truck had 33x10.5 and mine had 35x12.5 tires. Both were aired down. He has perhaps 700-1000 lbs more weight in his rig than I have in mine. He has selectable lockers and I have a single rear auto locker.
He would randomly bury his axles when going on flat ground. Mine, when aired down to about 12psi managed to stay on top of the sand unless I was giving it plenty of throttle, at which point I would sometimes bury my axles.
I don't know what pressure he was running, just that he has a York OBA and was aired down. He's on Toyo m55 and I'm on BFG KM/2.
We both had winches and shovels, plus a kinetic recovery strap. He has front and rear bumpers with tire carrier and ladder, etc. plus more camping equipment than I had. My winch has synthetic rope and is mounted inside my stock front bumper.
There's plenty of reasons for a steel bumper, and the only real down sides are weight and cost. Same with a winch. I've used mine plenty of times and would never remove it. Very handy, and at about $600 for an m8000 very reasonably priced. You can hotrod it with a synthetic rope to reduce weight and make it more user friendly. That, plus an aluminum hawse and you'll ditch perhaps 20 lbs off the nose of your truck.
We didn't need any of the recovery gear when playing on the dunes in Florence OR. But I certainly wouldn't leave home without it lol. Kind of like wearing seatbelts. Or helmets when on a motorbike.
Have fun with your build.