Welcome to the club...
I run on the sand a lot. I don't use radial tires, I use All Terrain tires with 2ply side walls and I go down to 13psi on the sand and inflate to 40psi on road. I find that at this pressure my truck rolls comfortably on top of the sand rather than pushing through it, building massive transmission temperatures.
At 13psi pressure I'm able to pull out other stuck trucks and climb to the top of the highest dunes (60' plus) with plenty of right boot of course! With the SOHC engine I recomend using the 4x4 high setting then if you ever find yourself buried up to the axels and your tires wont spin or only spin slowly, and you will if you drive enthusiastically enough, use 4x4 low and back out. Beats using the shovel every time!
I can't see any reason to take any more gear then what you already have, besides maybe an air compressor. I bring one with me at peak times because of the lines at the service station or if I'm going to a remote beach that is far away from from a service station because I don't like to run at 13psi on the road for any more than a few miles.
Remember if you get stuck and there is no one to pull you out, let your tires down more before spinning your wheels digging yourself deeper and deeper. Some people go right down to 5psi to get out of a bog. Then inflate them once out or go real easy on them until they can.
These trucks are awesome on the sand! Thats one of the many reasons why I bought an Explorer. People with Landcruisers and Patrols laugh at me for driving an Explorer and tell me to buy a "real" 4wd but I always have the last laugh on the sand and the highway too! I doubt you could get a Land cruiser to rev to 6000rpm or run up to 120mph in under 20 seconds....
Here is picture of my truck at 13psi. It was raining for about a week and the sand is quite firm even right up high almost a mile from the waters edge.
Oh, and as always Happy Explorations..... Luke