Thank you everyone for your suggestions/recommendations. We really appreciate them and they are very helpful.
We don't even have a Montana yet but are hoping to have one possibly by next year IF we do put our house up for sale. Husband is still thinking on this.
The CG we would be parked at does have quite a few RVs that sit there year-round but are not lived in during the winter but perhaps a weekend occasionally. There should still be a lot of open sites though and we do want to get the best one for our situation and I think the CG owner will be helpful in that choice, anyway that is the feeling I got from him. He said there is usually at least one RV parked and lived in during the winter months at this CG.
Blue, we will be anxiously awaiting your reports back on your adventure of staying in your RV during the cold months! I am sure you will have some very valuable info to share that will be very helpful. Keep us posted!!!