I have the 5k which I use for day hunting and just cinch it down with everything in. I’m really tempted by using a crib panel and a smaller 1000ci bag attached to it with the lid for day hunts. The 5k gets to be a little much at times, but I’m generally a cheap ass and won’t spend the money to go to the crib style system anyways.
I had a fusion K3 and now the RG K4. I much prefer the solid color over Camo for my pack system. Heck I’ve even been experimenting with solid colors for outer layers for whitetail with no issues.