Full time TT living in a four season trailer in mid-atlantic

Take a look at Lance Travel Trailers. They're 4 season suitable!!

WoodGlue

We winter camp in the area quite often and we also had a trailer parked at our farm (southern VA) for a while. A few things we learned:

The wind can be a lot worse than the nightly drop in temperature. Try to park in a less windy area or one that has wind breaks (trees and bushes) on the side of prevailing winds. If you aren't moving the trailer for the entire winter, skirt it.

Sunlight heats up a trailer fast. Don't park where it is shady.

Heat tape and insulation (the gray pipe shaped stuff) are great for exposed pipes and hoses.

In 13 winters with the trailer at the farm and two winters camping, we only had freeze problems twice: our fresh water tank once when wind got under the trailer (it was about 1/6 full) during a snowstorm and once when we didn't unhook our hose overnight (no heat tape or insulation). Both situations were resolved about two hours after the sun came up with no damage.

NetComrade, there are some on here who are fulltimers in the South who have sage advice for differing aspects of full time living. Others are passing along opinions they've heard others express. You're approaching this the right way--investigating yourself, getting some opinions, and research. In the end, it will be your choice and some of those who have contributed will be right, and the others will be wrong.

We spent from November through January in our "4 season" Heartland Caliber in the northern latitudes last winter after our house sold. We were further north than you--lows around zero--average around 30 (daytime high). We did not skirt the trailer (but should have). Propane (40#) about 2-3 days. Froze up the main water line (yes, it was heat-taped and insulated) once. Froze up the TT water lines (Heartland ran two lines in the very bottom of the underbelly) about 3 times before I slit the underbelly and insulated and heat-taped and insulated the lines. My black tank froze up once and I used additional heat and salt to thaw.
We were very comfortable both day and night. The furnace runs a lot, but we supplemented with electric heat. We kept a vent cracked to provide ventilation and reduce condensation. We would do it again in a minute, expect this time we would use a skirting of some kind.

Take a look at the Nash products, sadly they are a West coast company now but if you can find one locally I'd take the time to look at it. Most polar packages on mass produced trailers don't do much except add a layer of coroplast underbelly and a layer of foil insulation. A four season has enclosed tanks, valves, and plumbing. The water hookup is typically in a door enclosure to allow radiant heat from trailer. Most mass produced units have external hookups and waste plumbing/valves.

While there are TT's with advertised R-Values higher than others, all of them require heat in the winter and cooling in the summer for human comfort.
We lived in a TT while building a home in the early 80's. Having water, sewer, and electric on site made it tolerable. Good luck.

We've also spent winters in Madison and Gainesville, VA as well as College Park, MD. There are plenty of non-4-season TT's or 5th wheels that managed along side us.

As long as you have a reliable electric source, your furnace works and you have plenty of LP, skirting the bottom and insulating the water source and hose, you should do fine. We also found if you orientate the unit with the water connection on the south side rather than north, far fewer water freeze-ups.

Good to know.. We are at a bottom of the hill with plenty of trees around. Wind should be minimum. Skirting will be seriously considered..

Thank you for all the model suggestions, updated my search string.