I've used the Eberlestock Just One for 7 yrs now, almost every weekend. Collapsed it will still have room for a big spotter & tripod, coat, water, and all the other little stuff and you can still ride a horse or motorcycle. Last year I hauled a whole deer, minus the bones and hide, plus all the other stuff. Barely had enough room for all that. The newer models seem to have better fabric, mine has a few tears now.
