Update:
The locksmith came today. We tried several methods to get at least one door open. We concentrated on the electrical bay door because we wanted to test the K21 breaker. I have read many times about the long handled screw driver being used to get the nylon latches pushed in so the door would open. We tried that first. On my coach there is no access for anything to push the latches in. So no on that idea. Next we tried to create some space between the door and the frame by pumping air in to a small bladder fitted in the crack. It produced some space, but all we could see was the striker, not the nylon latch that has to go in and out when the door is latched. So no on that idea. Then we tried un-bolting the panel that is directly next to the electrical bay door on one side and the street side front tire. It is hinged at the top. We were able to pull it our about 5 inches. We could see the back of the striker. No way to get to the latch. So no on that idea.
Finally, we drilled a hole in the door handle at the exact spot where the bolt on the inside fastens the mechanism to the door handle. That worked. We had to take the mechanism apart through the hole in the door used by the door latch, until we could get hold of the rods that move the nylon latches. The door finally came open. We tested the K21. It is fine. It was pretty sure it would be, because the power cord bay works fine, with the key and the power fob. It has a replacement actuator, and apparently is not jammed like the others.
I'm resigned to having to drill all of the remaining jammed doors to get them open, which means I will have to ruin every door latch. I'm searching for replacements now. I started with NW RV Supply in Eugene first.
Now I have another problem. We took the K21 breaker off the wall to check it for damage. The locksmith did it because I can't get down on my knees and get inside the back wall of that bay. There are 5 terminals on the breaker. There are two blue wires and three yellow wires and I don't know which one goes where. I tried hooking them back as I thought I remembered, but the actuator on the power cord bay just kept clicking on an off. There are markings on the wires, so I think he may have marked them, but they mean nothing to me. I will have him come back again. In the meantime, if someone with a 2005 Monterey or a K21 break for the bay locks could let me know how they should go, I would appreciate it.