[siberian]

You have several choices once you get into or near Canada. You can take the ferry from Vancouver or Prince Rupert in BC to Haines/Skagway and then drive the rest of the way in and out of BC, the Yukon and Alaska or opt to take either the Cassiar Highway or the Alcan. I would recommend taking the Cassiar if you want a scenic drive as the 1,000+ miles of the Alcan is straight and pretty boring. The Cassiar though is demanding in the sense that although it is fully paved the edges are tricky and need your full attention on the wheel. Be prepared to see plenty of wildlife seasonally (buffalo, deer, bears...).

The ferry is easier and less of a strain though not cheap and of course depend on timetables should it suit your needs.

I don't know where your end destination in Alaska is, but Beaver Creek the US/Canadian border is about 600 odd miles from Fairbanks. Please note the Beaver Creek border US side is separated by 22 miles from the Canadian border post though the actual Canadian border begins just past the US checkpoint (there was just no suitable place to build the Canadian post due to permafrost etc. closer)*. Make sure you always fill up and take note of the mileage to the next town/village as you make your way north/south.

Still it's a wonderful trip, not a race if you decide to make the trip with or without a towed camper. And again. Bring as many spare tires as you can, fill up when possible and be safe

siberian

* Source US Border & Customs