what I used is similar to this insulator -
the tubing was narrow enough to thread it through the holes in the insulator - I tied off the other end with dacron rope.
4 insulators was enough to keep it in shape without a lot of bending
I tied the rope ends to the end of a portable fiberglass mast - the rope made it look like a big umbrella.
the feed point ladder line was brought back to the pole at the same height as the loop to keep the feed line from pulling that side down. I think I put a half turn twist in it.
I heard/read about a guy using the flexible aluminum tent poles to make "foldable/packable" loops but never tried it.
73 de N1SU