After studying several YouTube videos, I finally got the rear swing gate open. It was merely stuck from a maladjusted door stop. To open the gate, I held the white toggle up with my finger tip, held the door handle up as to open the door, and hurled myself against the door.
On the second hurling the door popped open.
Readjusted the door stop and cut a piece of 1/2" heater hose to wedge under the white toggle. It will never lock anymore, but it will certainly open. I'll find out on my next trip if the door rattles again.
Dean.