Cool trip!
300 mi range will keep you from needing to use your spare fuel, but there are places along the way that you may need to re fill at half a tank to not run out before the next station. Don't ask me how I know....
You got a diesel, I'd put a slip tank in that thing and fill er up before hitting the border and re fill everything where the fuel is cheaper, like anchorage and the bigger towns in Canada. At a minimum I'd pack some emergency fuel.....and a spare.
Driving slow is what it is. You won't be the only one and in the frost heaves, it won't matter, since you have to slow down.
Bringing the bikes will be a blast. Lots of unbelievable riding up there. Same for Sno machines.
Only difference from anywhere else is you can actually get away from civilization. And it's unbelievably beautiful.
Mid April could easily still put some snow on most of the roads between middle of BC and everywhere north.
