I'm also looking at a Yamaha TW200. Nice fat tires for snow.
www.yamahamotorsports.com
I sold my tw200 after 3 seasons of hauling elk. I'm a motorcycle guy and have many other bikes that are better for me. I'm buying a trailer from Quiet Cat and installing Rivnuts to the swingarm of my 18 KTM300 so I can tow it.
I'm also buying a specialized Turbo Levo mountain bike that I can tow the same trailer with. Then if the mountains are steep, I'll take the KTM. If not, then I'll ride a mountain bike with trailer.
The TW is ok but once you put a half an elk on it, it just wont climb hills. If you have a way to get out of the mountains that is fairly flat then you'll be ok.
My thoughts on the TW:
Front tire, replace with the Shinko trials tire and your ok.
Power, Massively underpowered for what I want it to do.
Forks, Need stiffer springs and I'm only 165lbs.
Frame, so weak that when you load it with even a chainsaw on the back rack, the frame flexes so bad it can pull you off the trail. Try it with an elk and you'll have to stand while riding. its bad! Probably a lot to do with the rear shock also.
Gearing, It runs out of power on even the slightest grades(no cargo). I'm talking about slipping the clutch to go anywhere and then you risk flipping over backward. Go up 2 teeth in the rear and its ok but still cant climb anything steep or with switch-backs.
What the TW was good for: Clearing dirt bike trails of fallen timber in the spring. Running to the store to get beer. Running to the auto store for parts etc. It's not a hunting bike in my opinion. Your better off with an electric bike & trailer set up or modify an existing real dirtbike.