JSSML
Getting your TT ready for winter isn't all that scary. I do cover up the AC unit. Why? My honest answer is, I see everyone else doing it. Probably to protect it from any freeze thaw damage that may occur. I always cover up the fridge vents and other vents to keep the snow and mice out. Just a precaution. I always put some mice poison under the dinette seats and other storage compartments. The can make a very big and expensive mess. Have a look at the manual and get under the TT and find all the taps that need to be opened up to drain all the lines. You may have 2 or 3 of them. Open up the water heater access panel outside and unbolt the plug. Check the plug size. Some plugs you need a socket that's 1 1/16". Some are smaller. But I bet most people will have a very hard time finding a 1 1/16". So check that first. Once all the water is out of the trailer, close the taps under the trailer. Now you must find the water heater inside the TT because you want to bypass the water heater. Your manual will show you how to do that. Close the valve that goes into your water heater and open the valve that bypasses it. You don't want to put any antifreeze in the water heater. Now most if not all new Travel Trailers have a pump. I don't know where it is on your Travel trailer but your manual does if you don't. You'll see, once you located, that it has what appears to be an extra hose attached to it. That’s the hose that you will put in to the anti freeze container. I always buy the pink stuff. Turn the pump on and go to your sink in the kitchen. Turn on the cold tap and wait for the water to turn pink then I do the hot. Now go to every tap and fill each line with anti freeze one at a time. Don't forget the toilet and shower head. If equipped, make sure you do the outside shower. I forgot one year. Not good! Once all the lines are full, your trailer is winterized. Just don't open the bleed line taps under the trailer. You only open those to get the water out. Next spring, hook-up to a waterline, open all the taps until the water runs clear. Once clear, open the hot water heater valve again and close the bypass (make sure plug is back in) and you're good to go. It's up to you if you want to cover up all the vents but just make sure you uncover everything. Other things you should do too is, take off the battery and store it at room temp. I always leave mine in the basement. Anything that is liquid in you cupboards, take it out. You don't want any surprises come spring. That includes the liquid gold toilet chemicals. I really can't think of anything else. OH! make sure you fresh water tank, grey water and black water tanks are empty too. I'm going from memory from last year so I'm pretty sure that everything here is correct. Make sure you have your manual with you. Really it takes way less time to do then it took me to write this all out.
FYI My last TT took 1 1/2 containers of anti freeze. I'm buying 3 containers for the new one. Just to be safe.
Good luck. We still have time so let me know if you have any more question.