Jet Sled is the best thing I have found to drag deer with. Don't waste your time with the dinky low wall kids sleds. The Jet Sled has something like a 12 inch depth so once the deer is in there, it will not fall out. Also works great because they are rigged enough that loading the entire deer into a truck after out of the woods you can put one side up and then lift/push the rest by yourself. They ride over logs, rocks, mud, snow, you name it. Well worth the $50 or so.
I do add a longer rope though
https://www.cabelas.com/shop/en/shappell-jet-sled
