Me and a friend rode to Alaska from Arkansas in '07, me on a 1200gs him on a F650...
Across Oklahoma up into Co. thru back roads, Royal Gorge, Yellowstone, Tetons,
Glacier National Park, Calgary, Baniff, toward Jasper to Prince George then up the
Cassare road... Thru the Yukon on into Tok...piece of pie...great adventure...
Go for it, I did it in 2011 on a 2010 C14-Ocala Florida to Alaska and back, slighly over 11,000 miles. Highlights for me included Beartooth Pass, Ice field parkway, Yellowstone and you can't go wrong anywhere you go in Alaska. Came back down the Pacific Coast and checked out Yosemite, Death Valley and Vegas. My advice is don't make any resevations unless there is some place in Alaska you don't want to miss. Don't carry extra gas, it's a hassle and I never came close to needing it. Ride every day until 2 ish and then decide how far you are going and use the internet to find a place to stay. I camped and stayed in hotels. Met tons of people and shared many interesting evenings swaping stories with others on the same trip. There are great campsites for RV's on the Alcan and they will let you throw up a tent for very little. Don't hurry lots of picture opportunities, wildlife etc. to see. Best trip of my life and I have been riding since 1976. Good Luck Almost forgot, get a copy of the current year "Milepost" and dont believe the stories about road condition. I only hit one bad spot where there was contruction, no huge pot holes or anything like that.
You should google Rick's Alaska Motorcycle trip. There's 7 videos. Once you start watching Video 1 I bet you will not stop till you watch all 7. Very interesting and you will love it.