Brrrrrr! Bring warm enough stuff--it's not going to be easy to buy there. The one time we were there when it was colder than intended I wanted a pair of thermal underwear. It took some digging to come up with an XXXL pair. (In the US I take a medium.) Language was *NOT* an issue--I'm married to a native. It was simply a matter of finding something that fit the giant.

I'd be a little leery of trying to take trains without any translation help as once you get off the tourist track English becomes basically nonexistent. I've never had to actually try to navigate it by myself but I completely had no idea what we were doing, something that's never happened anywhere else trying to take trains.

Other than these factors it's something I would certainly consider doable.