Two questions: Do you have a 4x4 tow vehicle? And, can you stay until March?
If you have traction control and chains, you may be able to get by with a 4x2 truck, but I wouldn't do it. And with a 4x2, you may be putting the chains on a lot more often than just when the "chain up" signs are up.
In Texas, you probably don't need a trailer with an "Arctic package" and a TV with winter tires and a block heater. You may not even have tire chains, an extra fuel tank, or an electrically heated water hose. All of these extras cost money and so does all that propane that you will be using. And seasonal campers generally pay for their electric power, as well as their propane, so that could get expensive too if you decide to heat electrically. As others have said, you need to include all these costs in your budget for the trip.
The weather will be better in March than February, you will have more sunlight, and chances are a little better that a few more RV parks and motels will be open. And, if you stay until March, you can watch the start of the Iditarod in Anchorage and the restart in Willow!
