We're also planning a 2017 trip, but we're going from east to west. Leaving Va heading north and into Canada via Vt or NH. Then across the Trans Canada Hwy, and work our way up into Alaska.
Planning on at least 3 months, lot of stops along the way to take in as much as we can. No itinarary, maybe 200-250 miles a day.
Planning it for over a year now. Wife retires in March, and in late April, or early May, we hit the road.