I/m certain you'll have a blast, pray its going to be dry sand so you'll enjoy it more.
- Air down your tires (if you're speeding, I would advise 18 psi Front and 15 psi Rear,, this will enable you facing the dune at an advantage ;-) otherwise both at 15 psi.
- No Acute turns when airing down below 15 psi
- Yes, don't slow down on deep and very soft sand unless you're stopping, if so no breaks. Take off very slowly don't let your tires spin, regardless of the terrain mode you're on.
- If you're stock, open the hood (for extra cooling) while engine is running, and move FWD & BKW slowly never above 1000-1500 RPM, with steering wheel turned to the extreme right then left in a repetitive way,, of course with the deep sand/snow mode on.
You may also try the Raptor's "Trail Control" to get you out of that.
Yes, keeping a shovel and some recovery boards will not hurt,,
Enjoy,,