Visit the Team Iceshanty Proshop
I ran angle iron 3/16 i think from the axle out the front & adapted the hitch to that. Welded everything solid. The one I aquired I'm doing the same & selling it. Good luck.
Can help you out with free windows. Also I am selling the acquired shanty on wheels. Let me know if your interested in either.
I would go with 1/4 inch ply on the inside and no more than half on the outside I found a place in nh that sells 1/8" fiberglass sheets on Craigs list, never did build a shack though and I just sold the sheets, he may still be on nh craigslist, search fiberglass panels
Any progress?Looking forward to seeing some pics.