If your trailer has a good solar setup and a generator for backup the winter camping locations you describe you'd be fine. I'm partial to Northwood and Outdoor RV(ORV), but in all fairness, most any half way decent trailer will work in high twenty's to forty's and do fine. As stated earlier in the post, Nevada, Arizona winters are different story. We boondocked with 16-24 degree nights and started loosing ground with batteries about a 10th of volt a day. After 4 days I was at 12.3-12.4 volts. Then we moved to another location and it was regularly 7-14 degrees but we had hookups. The issue of power and gas is conquerable. The big issue is going to be moisture and managing that.....as mentioned earlier.