Joyce and I live in Alaska, we are heading to S Dakota from Rhode Island at the end of April. We'll be spending a week in the Black Hills then up to Sweetgrass Monanat May 1st. On into Canada.
This time of year is a little quieter not so much traffic, things are just openning up so some services aren't always open. Generally better weather, can be alittle cool, lakes and rivers frozen and the Ferry out of Dawson didn't start running until the end of May last year. We check the weather every chance we get deciding if we want travel or explore. If it rained or snowed be careful, wait for it to warm up to make sure any ice on the road is melting. We are planning on 7 days from Montana to Tok, three days in Tok.
Just take you're time enjoy the trip up, there is plenty to see on trip N.