0 experience pulling a rig in snow
I've done it a lot but I drove in the snow for a living.Chains/chains and more chains!A 4X4 is a big help but chains are still needed in steep mountain roads.The trailer will push your tow vehicle and pass you on corners and the trailer brakes alone will put the trailer into a slide without chains.
The WDH hitch is your enemy on a solid snow packed road!
If you decide to do it(I recommend not too with a travel trailer) use chains on both the tow vehicle and trailer even if it is just one set on the trailer and even consider one on the front tire.Studs all around would be better than nothing.
Loosing control is multiplied 10X+ pulling a heavy travel trailer on solid snow packed mountain roads and I see wrecks even with snowmobile trailers way way to much from lack of towing experience on snow packed roads and people to lazy to put chains on!
Get a smaller Motorhome and stud it up for driving and camping on snowy roads.There much safer and easier to use in those conditions.
I lived 40 years in Idaho's Tahoe(McCall Idaho)where it snowed almost year around.