Ron,
You are going to be glad you did the knee replacement. I had mine done about 10 years ago and it got me back into the woods. Before the replacement walking was just too painful. I had pretty much given up on hunting. It takes about 18 months before you are fully healed. I know they tell you a year, but in truth it is a bit longer. Walk as much as you can and take big steps when you do. The more you stride out, the better your results will be. If you walk like Tim Conway's old man character while you are healing, you will keep walking that way. It does hurt more, but it's worth the effort, believe me!
Nice quiver, by the way!