Deliverator - this has all been discussed earlier.
Aside from gas, there are no mechanic services in DV. Lone Pine and Beatty are the only two places that have mechanic services. Better bet is Ridgecrest.
If your bike breaks down, we normally have a few people that will venture out to retrieve you and your bike. Between all of us, there is normally enough expertise and spare parts to get your bike operational, if not, somebody manages to make space for a rider and broken bike to get home from Panamint.
So, make sure your bike, gear, and yourself are in good shape for the weekend and enjoy DV! Have cash with you and you'll be fine.