There are beautifull courses all the way up from Canada through the Yukon to Alaska.Have you never heard of golfing at midnight up north,the land of the midnight sun.Just check out the golfing sites on the internet,tons of information including the RCGA.My favorite one last year was in Whitehorse.
North Star Golf Course in Fairbanks is the northernmost USGA sanctioned course. Nothing special but a memory maker. Also, if in southern BC, as I was in 2004, consider the semi-private course in Golden B.C. The course is very nice, the price was reasonable and they had several hookup sites for RVs. Think it was caled the Golden Country Club.
Lastly, if you're heading northward thru Idaho, you just have to play Coeur D'Alene.
If you would like to see pictures send me a private email