Yeah, pretty much. You get the chance to catch up on seep during the season, too, when the road is closed because of weather (can be several days at a time) or your truck is down. I generally go to sleep the day the road closes, and get up again about a week before the next season starts!
Ride Report: Canada North to South 2008 here
Drive Report: Ice Road Trucking 2005-2011 here
Ride Report: Northern Vancouver Island: here