? condition of highways from Montana thru Canada to Alaska?

You will find sections of thumpa thumpa everywhere. Generally we found the Canadian roads better than the US roads. Then there are the potholes. Big nasty tire killing spring breaking potholes. You are not driving drunk. You are trying to avoid the potholes and frost heaves.

It is the nature of northern roads and northern roads. Slow down. Enjoy the smooth sections. Some are as smooth as a baby's bottom.