Heck yeah it's warranted!
Certainly is a long haul though. The first couple hours into eastern Montana aren't much different from ND… west of you is about seven hours at interstate speeds of all the same scenery.

Eastern MT has a certain appeal, but things really pick up from Bozeman to Butte and on… only about 13 hours from you.
Oh yeah, and for those first 6-7 hours you'll probably be riding with a 20° lean against a constant crosswind. I'm really selling it, eh?
Worth it though! Even after living here several years, it's normal to go for an evening ride, see the mountains at sunset and find myself saying out loud… HOLY ****! It never gets old.