Similar recent thread, so I just copied and pasted my reply there:
"I very seldom carry binos on my whitetail hunts because of the locations of my stands and also due to carrying a rangefinder on every hunt. (I own two Sig Kilos). However a few years ago I was looking for a solution to carrying a pack with my climber to have the basic necessities along such as RF, knife, field dressing kit, folding saw, haul rope, flashlight, spare gloves, tree hanger strap, TP, etc. Camofire happened to have a daily special on their Alps camo bino harness for turkey season, which included a long attached pouch for a box call. Lightbulb went off and since it was only $30, I "pullled the trigger", After it arrived, I did an online search and ordered a matching RF pouch to go on the side, then moved the long box call pouch to the bottom. For about $42, I got a very functional system that has worked great with my climber....and gradually morphed to other forms of bowhunting. You can sure spend a lot more....I don't know to what extent you really gain?"