Interesting thread so I'll toss my experience:
When I was 29 I completely tore my ACL & MCL, Partially tore my PCL and LCL, fractured my femoral condyle, torn meniscus.....So yea my injury was bad. Cadaver ACL replacement went ok in December. PT was difficult, but 10 Months later I was on a Float Hunt in Alaska. Year after that I was on an alpine Black Bear Hunt in AK, so with diligence it can be done.
My Knee started to get bad again because of the Meniscus & baker cyst they didn't fix, so I had surgery again 2 years after the ACL. It ended up infected and 7 days later I was in emergency surgery to clear the infection and Its never been the same since. Didn't walk for 4 months and couldn't walk for almost a year without aide of a cane. 31 year old single guy with a cane didn't pull much tail that year as you can imagine!!!
The PT from that 2nd failed surgery and subsequent 3rd was grueling, but I was determined. I maxed out my allowable insurance PT and then even paid 100% out of pocket for more because it meant so much to me. I've since been to Alaska 4 more times hunting everything from Alpine Gizz to Kodiak Island and just last year went on a high country Velvet Mulie hunt over 12,000FT. My knee is junk and constantly aches in some manner, but call it stubbornness or pain management, I still do the things I want to do. I've been told by 40 I'll need a new knee and @ 37 I'm staring down that barrel it seems.
Do your PT and do ALL of it. You cheat, it only compounds itself. If your like me, nothing will keep you from your passions. I like you searched for reassurance and every bit of relevant parallels in experiences and clung to any bit of positive feedback. You'll be back, it just takes work and time. Goodluck!