I can't imagine working two dogs that much. Even if large healthy dogs - the daily wear on them combined with keeping up with their caloric needs and caring for health in general would be a big task. Even dogs bred and specificaly trained to pull sleds usually only successfully do so for a portion of their life. I truly get the allure of a nomadic lifestyle - it does sound wonderful. But as a pet owner, dog and all animal lover - I would be looking for a way to pull my animals along to enjoy their company rather than expecting them to pull me along. Really - I have a trailer for my two dogs for training and fun rides. (They aren't 100 pounds each though). Just my thoughts on the well being of the animals. I've never met you or your dogs so I may be way off on yours and their capabilities.