I have the OEM supports from my Triumph bags. I would suggest support. They have a nice liner that allows them to keep the shape but I think without the supports theyd be too flappy.

SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq NEW: 19 Goldwing Tour DCT