I’ve never worked for Desert Ambulance, but I have worked for Hall. That being said I have ran calls with Desert Ambulance, and spoken to a few of their employees.
Shifts are 48’s & Barstow is a busy city.
The pay is low, and from what I’ve heard management doesn’t have the best reputation. A great place to gain experience though. Bakersfield may be far, but the company treats their employees better then most. Unless you have commitments tying you SoCal I recommend rethinking writing them off.
Also, you have so much outside of OC/LA why did you mention only those two companies? AMR in Riverside & ICEMA. MBA & SLO both have a good reputation.
Good Luck!