Sleds have been around for a long time and I'm sure we've all had some experience with plastics for glide over snow or tundra.
My dilemma has been finding the perfect sled for backcountry use that when the drag is accomplished...what to do with the sled in the field. I've also been using plastic sleds for packing in or out more weight and bulk than one trip with a backpack can handle.
Last year we used sleds to portage 1 mile off a ridgeline in fall to reach a floatable channel for our moose hunt. That experience was so frustrating that it inspired me to start to work on a backcountry sled that works well for float hunters (to name just one application).
The video below shows a sled and harness design I've been working on that is completely roll-away and highly functional.
The two top choices for plastic material are UHMW and HDPE. These two materials have the lowest coefficient of friction available, but one is way more expensive than the other.
I ended up using HDPE for its lower cost and reasonable Coefficient of Friction. UHMW is a superior plastic but cost prohibitive for my applications.
The finished dimensions of the loaded sled are 20" wide X 58" long, with 8" sidewalls and 10" front and back panels. When rolled away for transport or storage, the sled becomes a 6" diameter X 36" long item that is easily clipped onto a raft or canoe for the float. The material is 1/16" HDPE.
Here's a video. Happy to answer any questions.