I am sure you are knowledgeable about the winterizing stuff, so will pass over that.
I do go out at least once a month and start the engine, either gas or diesel. I let it run for awhile after it reaches running temp. I feel its as important to run the generator under a load. I will start it up then plug in an electric heater. My rigs have always been plug in to shore power 365 so removing the batteries is not a concern. I do have a trickle charger on the engine batteries.
Other than the normal winterizing stuff folks do thats all I do. Now is that correct or not do not know but its been working for me for year.
