I added the Otters -- Sorry for the oversight, I was really focused in the 8'x8' or slightly larger, and the headroom, so I overlooked the lodge, not thinking the 76'' Would be tall enough if you were not in the dead center. I wanted the Outbreak due to the full door, but that is a lot of area to heat.
Regarding The Polarbird, I did not look at it much due to the Floor. I Usually wear Cleats, and I figured they would trash the floor. If anyone know different let me know.
Feel free to add, I can put them in the table.
The weights and dims, I pulled from a lot of places, so I apologize if they are off. Correct me, and I will edit. The manufacturer websites are not great on some of the shelters, usually lacking some key information, such as height!