El Mirage Dry Lake will be the best place to start IMHO
Without any doubt whatsoever, the very very first thing you need to do is to make the acquaintance of "Fiddler" (or Flying Fiddler) on this BCP forum. He has become a very good authority on this stuff, and he has themost recent, accurate knowledge of all the off-airport stuff in the Mojave Desert. He is skilled, safe, and very well familiar with this type of flying. He has also taken it upon himself to become a flight leader and "tour guide" for this type of flying in this area. He is definitely the place to start.
In general, the lighter color of the lakebed the drier it is. It often takes a good week or more after a real good rain for it to dry out. If you fly there, have enough fuel to fly over the lake bed, and turn around to go back to Brian Ranch or Victorville or Apple Valley if the lake is wet. There is no more fuel at Hesperia, as of the last time I was there 6 months ago.
One of the reasons El Mirage is the best starting point is that on any given weekend there are all sorts of vehicles, go-karts, lakebed race cars, R/C airplane flyers, etc. If they are driving around on the lake then that is a good sign as far as dry/wet.
Get with Fiddler and he will show you the ropes.
Cinder Cone is pretty and exotic looking, and usually dry, but it is very close to the lee side of the Sierra Nevada mountains. The winds and turbulence there can be pretty significant. A stock 150 can be not enough airplane in the winter time / wave season.
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