I wouldn't bother. If you are going to use it that often I'd just keep some heat in it. Of course, that depends on where you live. You can go through a lot of propane to run the furnace if you live in Nome, Alaska but no very much at all if you live in Arizona.
Here in Wisconsin it rarely gets below minus 10 degrees.

During those times when I anticipate use of the RV I'll leave the furnace on. But, you don't have to crank it that high. If you set it at 45 degrees it'll keep things from freezing. Be sure to keep some cabinet doors open so that the heat can get to the water lines that are in them. Your furnace will heat the water service bay and holding tanks so that's fine too. Just keep the hoses put away and the bay doors closed tight.
If the weather fluctuates quite a bit you won't have to keep the thing heated every day as long as you keep an eye on the weather forecast. We do that and if we see it's going to get down around 35 at night I'll turn the heat on and set it at 45. If it isn't going to get that cold, why waste the propane.
Winterizing and dewinterizing can get to be a pain after a while and if you forget something and it freezes up it'll cost you. It's best to keep that for when you know you'll be parking it for a while.