Jan,

I wonder if thin electrical conduit or 1/2" pvc pipe with screening
on a steep angle might not help.

The conduit would be stiff, but light. The pvc could be bent and tied
across T fittings at the ends to hold an arc in place.

By having a steep angle, you would not have to sweep. The leaves
would pile themselves up for you.

If I were doing it, I would take the sewing machine and run seams to
make it a single piece and a fold up the sides for the pipe/conduit to
go through. That would allow it to be taught.

The PVC could have gaps for T or X joints. The same could be done for
the conduit.

By having the connectors unglued, the whole thing could come down and
be a roll of screen and a group of pipes.

If you spray painted the pipe/conduit, they could be unobtrusive.

Just a thought.

Jim

I suppose an alternative would be velcro to tighten the screening.