Great that you're finally hitting the road, i am in exactly the same boat. I fly into Alaska on 14th June, pick up my bike there and will be heading up the Dalton Highway to Deadhorse, then all the way south as far as my cash, energy and work will permit. If i can make it to Argentina, then even better.
I will be heading down through Canada, across rockies on TransCanadian, then down into Montana, Wyoming, Idaho and south to the border and out.
If you're going to be around, then maybe we'll be crossing paths and can hit some tarmac together. Let me know