You will not have any problems with the road. Fuel mileage for 14k plus you are probably in the 10 ish range per gallon. The fuel stops are more so in the summer than in the winter but no farther than 250/300 for any place. I WOULD have an aux transfer tank installed. You would want more range than what the 35 gallon main would give you. We pick the major towns to fuel up as the might have better quality or cleaner fuel than a podunk stop. When we traveled with some friends with a camper on the back so they did not carry any extra fuel and we had to stop and wait for them every 250 miles and this was in October. As fuel in Canada is sold by the liter and now prices are over $5. 50 per gallon in US prices and a little more in canada when you do the liter to gallon exchange rate. It will be spendy but enjoy yourself and have a good trip. Lots of fantastic scenery and wildlife along the way. Lots of campgrounds along the way in the summer. Having a Milepost way befor you travel is a good idea for your first trip, study it well befor you leave so you can make a plan for stops.
Joe Badura