re: Getting wild grapes to produce more. Anybody here ever tried this?

Make a run about 4 feet off the ground so it is easy to prune and tend to them. Use T posts or 4x4s and run some fence wire between. If you do wood it would be easy to run parallel wires about 2’ apart by having pieces of 2”x4” on the top of the posts. You could do two runs vertically but F working on your knees if you can avoid it.

Or get something rod iron premade thing if you care about it being fancy.

Then train the vines by tying them loosely to the wire with construction twine or zip ties. Wrap them around the wire but don’t overdue it or they will break. The vines you don’t train trim. Clean your pruners with alcohol to avoid spreading diseases between your plants.