Some states allow tandom trailers.
I have seen them here in CO. I bet WY, Idaho and montana allow too!
Oregon.... You'd probably be tossed in the re-education camp for even thinking about it.
I agree, I-80 is much better than I-70, I would never try the I-70 route in the winter in my Dart. Going over the passes on 80 it's a much more gradual rise in elevation, not like the steep passes on 70
