I put ours away every early-mid November, I just disconnect the negative leads and move them so they can't contact the terminal. Even with the disconnects turned off my coach has some small loads. Disconnecting the terminals kills everything.
A fully charged battery won't lose much by the time I pull it out for the first Moab trip in March. Last year I didn't have to put a charge on them at all. I did check monthly with a multimeter.
By the way, were you through Durango lately? Saw one just like ours with CA plates heading down to Farmington a couple of months ago.
The above post is just my experience/opinion which is worth exactly what you paid for it.
'05 Lance 845/'06 F-250 or '99 Alpine 36SDS Usually towing an '01 Wrangler locked on 35"s or moderate '98 Cherokee on 33"s (rear locker only)