I've been on the SG kick for quite a few years now. For me, especially when it comes to moose, the lid is non-negotiable. Big enough to put a bladder in, rain gear, and a blade or two and some game bags. The lid goes everywhere with the frame for me. The kifaru universal stays on the frame always. I find that system a better fit than the SG version.
Backpacking, the lid, a Kifaru GB, and two large hip belt pockets. Bladder sleeve inside for a 3 litre bladder, and I could be 100% on all I need at that point.
I do have a couple of the swing out pockets, and I use one as a toiletries kit bag when I'm traveling as well.
Have the nalgene pocket and the spotting scope and the other accessory bag as well, but those only made one trip and that was it. No idea even where they are now in the house. That said, I have my gear and system pretty dialed in at this point and that stuff is just extraneous noise for how I like my stuff set up.