I had a shack that was on skis, and the top of the floor was 12" to the top of the ice.
I cut a hole in the floor so the bucket rim (where the handles attach) would not go through the
hole. I needed a second bucket under the shack to make to the ice.
Helps stop drafts, etc. but my next shack will sit on the ice while in use. It will then be up on skis or a trailer when not in use.
My coroplast shack floor was just a couple inches from the ice. I cut bucket holes, but didn't need them
most of the time.
You might find some sort of plastic piping (culvert diameter) to use instead.
MD