ID-34 from McCammon to Alpine

Idaho has a travlers app.
Just google the state hwy # you want info on.
US 30 should be no problem it was the first US .transcontinental road

34 has some narrow, winding areas (it's not a big road) but you should still be ok, just take it easy. It's probably no faster a route than taking US 89 north from Montpelier ID, even though the latter goes over a higher pass. It's a bigger road & a nice, scenic drive either way. I'd give the edge to 89, though. We've towed a 34' TT over the 89 route with no issues.