batteries in the winter

[Campinfan]

Ok, so another battery question. The motor home I may buy next week has 2 12 volt batteries in it, not that that makes a difference in my question. I will be storing my unit at home and have a pedestal with 30 amp service.(It was installed when a previous trailer was 30 amp). Over the winter I have some options. Should I leave the MH plugged in all winter and the batteries connected. If I do this, I have a new Battery Minder (not a battery tender that only trickle charges) that keeps the batteries from sulfating---should I attach that to the batteries too or or should I disconnect the batteries, and just use the battery minder. And if I do that, can I leave them in the rig or should I bring them in the house. I am thinking I should bring them in and use the battery minder.
I am open to suggestions. Thanks all.

[way2roll]

I always brought my batteries in the garage on shelf with a trickle charger in the winter if I wasn't going to be using it for a while. An ounce of prevention...

[Cybergrunt]

Same here. RV and mower batteries spend the winter lined up on garage work bench, all get several hours of trickle charge once a month.