:), at least run the genny.
If you choose the portable genny route, then you have to be concerned about someone walking away with it. You have be able to always hide it when not using it. Someone told me about one being chained to a tree while the owner was away off his site. When he returned, the tree and the genny were gone. Just sawdust remained.
In order to run an AC unit of 13,500 or larger , you will need two paired 2000's because a single larger unit like a 100 plus lb. 3000 will probably be heavy to lift and move around.
If you choose to go the portable genny route, they too need to be exercised the same way as any other generator.
If you choose two Honda 2000 or similar, you will need optional pairing cord and rv converter plug for the 30 amp outlet. Each genny will weigh about 50#, make sure you can handle lifting that weight in awkward positions. You know, as we become younger all that stuff becomes easier. :)
I think you should drive the rv to go shopping or whatever, run it , you are doing more harm parking it and leaving it.
I would do a full service on the Onan. Whatever needs to be done but at least a fuel filter and oil change once a year.
When you turn off an Onan, shut off any load on it, then shut it off. This reduces premature failure of certain parts, like the voltage regulator.
When you store the rv, try to find non ethanol gasoline. Google search near you then call to confirm they have it.
it will be a higher octane fuel but well worth it.
Stabilize your fuel, Sea Foam, StarTron or the blue Marine Stabil all work well, read the amounts needed on each bottle.
Once you add stabilizer your fuel, drive the rv while running the generator to transfer the stabilized fuel throughout both rv and generator lines. Now, when you start the generator once a month for 30 mins, the generator fuel lines will remain protected.