I got my first long tire tow in this weekend. 2.5 hours. It was great! I wandered through the canyons, dragging the tire up and down hills. The interesting part was that pulling on dirt was extremely easy compared to smooth asphalt and concrete.
But! Towing on trails was irritating, as rocks, sticks, and detritus caused snagging, making me fight with the tire. It is good training for rambling over crumbled ice.