Have you been maintaining any kind of rehab/stabilization training on the knee since you concluded your 8 week stabilization training?
Any feelings of instability in your knee?
How long ago was the initial injury to your knee?
I’d suggest dialing things back a little bit/finding some alternative options for the knee. Biking/swimming and resuming your rehab exercises for the knee. If you haven’t already, purchase a knee brace to give it some support.
Last thing you would want to do is flare up the knee more and spoil your Chamonix trip. May be worth getting an evaluation to assess if there is any laxity or instability in the knee. Which if so, would warrant some reconsidering of your plans.