I did that trip 4 years ago. I live in Red Deer, Alberta, which is half way between Calgary (World's Best stampede) and Edmonton (Home of the West Edmonton Mall). The chances are great that on a journey from Florida to Alaska you will travel through Alberta at some point. You could work yourself northwest towards Great Falls, MT and either come north into Canada or go a little further west to Glacier National park and then turn north towards Canada. In Alberta we have Waterton National park which joins Glacier park, from there you can travel north on hwy 6 & 20 (Cowboy Highway) towards Banff and Lake Louise and then go north on the Columbia Ice Fields highway to Jasper. This route has stunning scenery. From Jasper you can go two ways. First, a little bit east and then north to Grande Prairie via Hwy 40 (little hilly and twisty) or second choice is to go west to Prince George, BC and then north towards Ft. St. John BC and then on to Dawson Creek and the Alaska highway. Or if you don't have that much time just go north from Great Falls and enter Canada on Hwy 4, Hwy 2 (through Calgary, Red Deer, Edmonton, etc) and from there up to Grande Prairie, which is all 4 lane and divided. IMPORTANT If staying in national parks you better have a reservation and get them early, google Parks Canada.