I currently have the Eberlestock X2. This year was the first year I used my saddle for gun hunting, previously had only done archery. The X2 is pretty good size and packs up my platform and sticks really nice (currently have Latitude carbon sticks and the X-wing platform) and leaves plenty of room for extra cold weather gear or whatever else you might need for gun season. I mostly hunt the UP of Michigan during gun season so extra layers are absolutely required. I've also done some out of state archery hunts and love the pack for all day sessions where I'm getting down and glassing/moving around during mid afternoon, so I need to carry in extra gear and layers. Eberlestock also sells a separate gun scabbard that attaches to your pack via molle webbing that I've got my eye on. I can try to take a picture later of my setup with the sticks and platform.
My only complaint is the overall size of the pack, but that's purely for early archery season when I'm trying to get in and out quick and not work up too much of a sweat. I'm currently looking around for a more streamlined setup for those quick hunts after work where I don't need a huge pack, so once I get that dialed in from early archery through late gun season. Currently leaning towards the Trophyline Platow pack for those situations.