cwr

Just to share my experience in our travel trailer in northern Virginia last winter... If you do prep work, like getting a good hose, getting heat tape, and insulating it, put some kind of skirting around the RV (we used foam insulation board from Lowes), put heat pads on the holding tanks, and have heat lamps on the ready for when the pipes might freeze, you can pull it off. We usually didn't have problems in freezing temperatures until the temps dipped down into the mid to low 20s. Then we had to deploy the heat lamps to make sure the pipes (which are run underneath the RV with no insulation) didn't freeze. Our TT basically has no insulation, and we made it work. But it did take a good bit of prep work. Also, keep a hair dryer handy in case you need to thaw something out.

Lowes sells a great Whirlpool 1-micron charcoal filter that fits in a standard whole-house canister. They come in a two-pack for $15: https://www.lowes.com/pd/Whirlpool-Whole-House-Replacement-Filter/50331861 We use this to filter all water coming into the RV (turns dark brown water at our current campground into clear water!) For drinking water, we then use a counter-top reverse-osmosis system with a UV stage, then add mineral drops back in to the filtered product. http://www.freedrinkingwater.com/ro-counter-detail.htm We've been happy with the set up so far.