AH man, the memories of hitting the dunes
I miss it
Your tires will work great in the soft stuff! Drop the pressure down to ~10-15psi. I never popped a bead at that pressure, but that doesn't mean that you wont. If your suspension is flexy, it sure helps out if you have open diffs. I ran open diffs in a Jeep without any problems of getting stuck. Remember that speed is your friend (but not too much speed
). If you stop, stop at the top of a hill/dune so you can get going easliy. Take a hi-lift (in-case $h!t) and a piece of board to put the jack on so it doesn't sink in the sand.
Keep an eye on your temp gauge, sand can sure tax your drivetrain!