Can you post a picture? It's difficult to understand your verbal description.

Here's a clickable link.

Here is a link that might be useful: foldable trellis

I think the slope is probably okay, but I'm not sure the cucs' tendrils will hold on to wood slats. You might need to put some wire fencing or netting over the trellises. And you would want the openings to be at least big enough so your hand can fit through.