I do the same thing, we also have covered storage and our motorhome will sit in storage for 3-4 weeks at a time until the traveling bug hits us. But, when we take off we usually drive long enough to use a couple of tanks of diesel through our Cat C9. When in storage, I disconnect the chassis master battery disconnect switch that disconnects everything 12V. I have AGM house batteries and they discharge very little in 3-4 weeks. All good suggestions from the previous posters. Enjoy your new motorhome...