Taking the toy hauler up to the ski resort? Any problems?

So if the road has snow and I am sure some ice with sand if I chain up will it make a difference? I am mostly worried about the decent as the trailer outweighs the truck. I don't have to take the toy hauler up but I see others there that are just a little smaller. I was thinking I could just use the trailer brake to come down the hill for the most part but I can't feel the brakes working and if it started sliding I think I would be in a lot of trouble. How about chains on the trailer to give it some bite on braking?