I added an Otter universal tow hitch adapter (
https://www.otteroutdoors.onlineofficesystem.com/details.php?prodID=111 ) to my Frabil Sentinel flip-over ice shelter, and I tow it behind my snowmobile with the Otter tow hitch with pins (
https://www.otteroutdoors.onlineofficesystem.com/details.php?prodID=109 ) which I also use to tow my small and medium Otter Pro sleds. If I mounted the tow hitch adapter right on the front of the sled portion of the ice shelter, when I towed the shelter over bumps, the hitch would hit the lip of the sled portion of the shelter, which would try to lever the hitch adapter out of the sled. I mounted each hitch adapter on top of a block of plastic so the hitch can’t hit the lip of the sled.
Here’s a picture of the ice shelter being towed behind my snowmobile. As you can see, the hitch angles up at a pretty steep angle from the shelter, which is why I mounted the hitch adapter on blocks of plastic.