Do a search for Desert Racing and see what pops up.
Of course SCORE and DAKAR have already been covered.
For example, I visited a BEST in the DESERT
event and helped in the pits last Summer. If you have never been close to a Trophy Truck or the real buggies, I suggest you fly into Vegas for a weekend and check it out first-hand.
This might be too much information, but check out the different racing schedules HERE
Do your homework and move to Nevada might be the easiest response?