Dennis,
I would be interested to know the Beaver manual says about using an air compressor to air up the coach, I haven’t noticed anything about that in our manual.
But yes, you can air up your coach with an air compressor. There should be a male air-chuck in the generator compartment, ours is low on the curbside. A portable air compressor can make a lot of water so it would be best to use a portable air dryer. This would allow you to raise the coach and release the park brake. Not sure what kind of air compressor you would use, but monitor the air pressure and don’t go over 120 PSI.
-Scott