A while ago, when starting to hunt elk solo I thought I needed a block and tackle to get the meat off of the ground. So I made up a nice kit and carried it for a season or two but never actually used it.
The idea was that I would climb a tree and screw in a treestand step and then hang the top pulley from it. Then I would hoist the meat up the tree. The kit that I made up is a pulley system made up of lightweight composite pulleys used on sailboats and the cord is a high strength small diameter super fiber that I can't remember. It might be Dyneema. All of the components are sized to haul up 300-400# of meat into a tree. It has a 4:1 ratio so only 100# is needed to pull it up. I tested it by hauling some logs up into a tree. It works! I vacuum packed it all together. I'd be happy to sell it for half of what I paid. Send a message if you're interested.