Will they be removing the damaged part of the meniscus or is it a true repair? Big difference. I've had two tears cut out (both radial complex tears, one on each knee). Lucky, my doctor is fairly aggressive given he is one of the orthopedic sugeons for the US Ski and Snowboard teams. On my first one the intention was a repair, but once they got in they decided that the damage was to severe to repair and just removed it. I was told for a meniscus repair expect to have the knee isolated for 6 weeks minimum.
for me, within 2-3 days I was off crutches.
On the last one, within a week I hiked Mt Humphreys on crutches (didn't want to stress the knee... totally non-technical but still 9 miles and 3500ft altitude gain).
On day 9 did a 1.25mi bike ride. Also on day 9 started to Top Rope climbs using only my good leg (and the arms). Continued both the biking and TRing of climbs until day 30.
On day 10 started PT.
On day 14 started easy weights
At day 45 started to lead using both legs. (doctor didn't authrize me TRing climbs but he never said I couldn't so I figured it was ok, though I never did ask if it was ok....). Came back like nothing happened (profile photo was one the first day back from surgery).
Good luck with the surgery.... Never fun