I never understood why "packing flat" was important in a climbing stand.
I own a Summit Viper and a Summit Bullet backpacker (that happens to pack flat).
I like them because they're comfortable....and they allow me to satay on stand longer than I would in something less cozy.
The Viper series (and I assume ALL Summit climbers) seats are adjustable. Though I keep mine adjusted hanging lower.....the premise is.....when bowhunting....NOT to let them hang so low in the rail. That would make this statement a moot point.
plus how you sit down in the bar, that put the bar too high and was in the way if the deer were close to the stand.
Setting the seat low is for rifle hunting (although it IS the most comfortable setting).
I sit most all the time while deer hunting....and to my knowledge....I've yet to be busted trying to get to a standing position to shoot.