We took 93 N to Kalispell (going to W. Glacier) from Missoula.
Good road.
We try not to take "Bobs Road" when possible to avoid issues.
If you really want to take it,
Go to Google maps, Satillite view.
Click on the start of the road until you get into drivers view mode, then take a virtual drive down the road. Watch for trees covering the road (possible low branches), low bridges (railway bridges are bad for that), railway crossings (some are not flat, they are humped and you will drag your landing gear, or worse, get stuck). 90⁰ corners in a tiny little town that you could not possibly make.
Its a very useful tool, but does not work on every road.
Safe travels