If your route shows 5600mi then you will prolly put on over 6k mi with side trips. In 24 days, that's approaching 300 mi per day, IF you drive every day. Spend 5 days at one place combined with driving thru the Midwest and northeast which is not fast like out west, you'll be hard pressed to make the whole trip and get back within your timeframe unless you're just boogying down the road all day every day.
Sounds like an awesome trip. Nothing special about getting into Canada other than no felonies, dui s, guns and have your passports.
Best of luck but if I was making a trip that far and momentous I'd plan on a little more time.
Took a week to drive from Seattle to Anchorage last year and while we enjoyed it, we certainly didn't get off the beaten path and didn't spend much time doing anything but driving and camping along the way. No other tourist activities. Gotta remember it'll take a little longer drivin a big bus with a trailer than blowin down the road at 80 mph in your car.
