I do a lot of coyote hunting and pack all my gear on my back scabbard, leaves my hands free for trekking poles, ski poles, handlebars etc.
Chair/stool, spare call, shooting sticks, lunch all go on the scabbard.
I do have a hard scabbard on the bike that I put the rifle in going to and from hunting but use the back scabbard traveling from stand to stand as it is easy to bail off the bike and walk out to a stand for a hunt. I do park the rig and take long circle hikes through remote areas and do multiple stands also.
Nimrod back scabbard, they make a pack to go with it.
https://nimrodoutdoor.com/collections/pack-accessories