Sorry to get in on this so late Sky and i am definitely familiar with your situation. I pulled of the trifecta 8 years ago, ACL, PCL and MCL torn as well had deep bone bruising and medial meniscal tear. After the accident I was forced to wait 16 months for the surgery due to the bone bruising. I would have preferred a total replacement but that was not an option due to the extent of the injury. I would have also preferred donor tissue instead of scavenging tendons to make all the ligaments but my surgeon refused to do that. If the option is available definitely go with a total replacement, it would have been a quicker recovery in my cas anyways.
The problem with the drugs, besides addiction, is that your brain has no way to know when you are doing damage. That shit hurts for a reason, when it hurts you are supposed to stop doing what your doing but when you are over medicated you are just making things worse. As a result of a few years of heavy medication my knee still hasn't recovered because i keep reinjuring it. Now i am having issues with my other knee, my hip and my back from just driving on through the pain. I haven't taken a pain pill in 6 years and i hurt everyday but it is better than the alternative.
I wish you the best of luck with whatever decision is made.