I am trying a system of hanging twine pieces with plastic clips that lock onto the twine and support the vines. I had 20 ft lengths of steel pipe lying around, so I drove 2 x 4 stakes into the ground and screwed a sort of angled T bracket on top to hold the pipes. The twine pieces hang from them.
The biggest lesson learned was to drive the stakes into the ground before the plastic goes on over the hoops. I thought of this early enough, but just didn’t have the time to do it.