One of my favorite drives. I've stayed at several campgrounds between the two towns. Kalispell is the only bottleneck traffic wise but well signed and not that big a place, so doesn't take much effort. If you are interested in any RV parks or interesting places, let us know. BTW, my rig is 60' and not had any issues on this route.
2014 RAM 3500 4x4 diesel
2017 Work & Play Toy Hauler 30WRS