Whoo-hoo, I just made it to all 50!
Idaho was the last unvisited state. A week ago, we flew to Spokane, then drove east to Idaho, ending up in Sandpoint. We spent a beautiful 3 days in Idaho, with car tours into Montana, then drove to Portland along the Columbia River (another bucket list item).
It was really great and now I can say I have visited all 50 United States!