Make sure you have the cables pushed in as far as they go........just keep pusing until they are wedged in a much smaller arc. Not only with that reduce the brush grabbing it will keep them from rattling.

Scrap the nylon web straps.......get a set of PADDED shoulder straps and keep them snug. Any strap that isn't adjusted properly will cause the stand to sag and really exaggerate the packing effort, but nylon will just beat you down.

Use 2 cinch straps (w/ the alligator clips) and the bungee to pack the stand.
One strap across the ends of the arms of the stand and around the platform........the other around the meat of the platform and THROUGH the seat straps underneath.
Hook the seat bungee cords to the platform for even more stability.
(Don't pin down your shoulder straps.)
I've been packing my Summits in all over the place.......Cobras, Bushmasters, Vipers, Goliaths and they don't move, rattle or sag.

Take the time now to practice a packing routine that gets it good and tight and follow it. And get rid of those nylon straps........I'm telling you there is no comparison for packing. Get them good and snug on your shoulders so the stand rides high and you'll see and feel a world of difference.