Welcome to the ROC.
There are plenty of sand discussions at the ROC. The key is to lower sir pressure, probably down to around 15 psi. You should also pull the 20A VSA fuse in the secondary underhood fuse box.
With lowered air pressure, you can't defeat VSA with the panel switch (safety feature), ergo the need to pull the fuse. You need to disable VSA so you can maintain momentum with wheel spin. If you don't disable VSA, it will cut the throttle if it can't control wheel spin by braking the spinning wheel. In this scenario, it will bog down just when you need to keep wheelspin going to maintain momentum.
Be sure to air up and replace the VSA fuse before you return to the highway.
Make sure you understand how Honda's VTM-4 system works. While it is similar to a conventional part time 4wd system, it is not meant to be run in continuous 4wd manual lock mode. Just leave it in D and go. If you get stuck, use (gear) position 1 and select VTM-4 lock to help you get unstuck, then turn off manual lock. Read up on the system so you fully understand how it works before you head to the sand.
