California Desert Backpacking

I’m looking for a three or four night loop to do the week after next. Most of my backcountry experience is mountains, but this time of year I’m thinking maybe something like Joshua Tree or Death Valley/Eastern Sierra areas. Maybe a bit warmer/drier and there’s the wildflower factor. Also…hot springs? I’m willing to drive a ways out of the SF area. Any suggestions? Favorite spots? Tips? The more specific the better.