I used to have a permanent shack but got caught one year with heavy snow. Ended up with about a foot of ice above the floor and a note from the local CO that he expected it off on time. Well, 3 guys, 2 days, a chain saw, and a 30-06 with a box of shells later, it popped loose.
I now have a so called portable 6′ x 8′ fold over floor house for when the family comes with and an Otter Cabin for when I am alone. They both fit in the truck box.