Are you allowed to run studs on the road the whole distance? If so, I would get a dedicated set of rims and put studded snow tires on them. Something like Blizzaks with studs will go anywhere and stop when needed. But I'm not thinking that Blizzaks would be great for towing with a 3/4 ton and long trailer.
Maybe a studded set of DuraTracs. There shouldn't be that much "deep" snow on the roadways, and the DuraTracs hold the road pretty well even without studs.
