Hey, sounds like a great trip in progress. Last summer i did yukon and a few other places. My suggestion is that once you hit watson lk yk head up hwy 4 and do the nahanni range. If you do this pm me and i will provide you with gps coordinates for a cabin you can spend the night in. Have a look at my in progress and completed threads when you get a chance. For the north canol you must bring extra fuel to get up past the border and back! the north canol was my favorite rd of all last yr, sheldon lk has a beautiful beach you can camp on. The dempster also has some great spots aside from the paid campgrounds.
Wish i was up there right now again!