I didn't close the ends of mine and haven't had trouble with varmits, but that would make it more finished. Last fall I moved this buckeye tree and it survived. I had a bunch of weight on the front of the trailer. I made a trench next to the tree and pulled a strong wire under the roots to cut it loose. I have some extrra old Simplicity 2 wheel tractor hubs and wheels, pulling the clip pins lets you remove the wheels in seconds. I underslung the frame to the axle, welded and Ubolted to make it lower and easier to load big pieces.