examples on how to make guided trellises
Here's a link with several ideas, Doug:
Here's an article that might help - https://www.thisoldhouse.com/how-to/how-to-build-trellis
Doug, here is one idea I chose for you, but you can find many more. Click on "explore projects" then type "trellises" in the search box and hit enter. There are many more you may like better: https://www.hometalk.com/1452431/fence-picket-a-c-unit-cover
Here are some very helpful videos!