The Canadian Rockies 

What a gorgeous area.  Banff and Lake Louise are pretty spots but over crowded and expensive. A drive around Banff and Yoho National parks will give you plenty of opportunity to find great views and solitude.  Located not too far north of Idaho and Montana this area is well worth the trip.  During July and August reservations are a must.

We took a Fantasy RV tour of British Colombia and Vancouver Island

What a fun way to tour with a great bunch of people.  We traveled over 3000 miles in some of the prettiest country you will ever see.  The drive between Jasper and Banff is the best drive in all of north America.