I had that done.
Let's see....I used the crutches for two days, then ditched them, just be sure to use that lil machine they send you to move the knee up and down! Its crutial to use it to get the motion back in.
Dr told me I wouldn't be training for 6 weeks, which my reponse was..that is a negative, I am doing a show in 16 weeks, so you have 4 to heal it. I was back in the gym doing upper body workouts 3 or 4 days after the surgery. I just wrapped the knee, then iced it down when I got back home. Started lifting lite with legs 4 weeks afterward.
The dr. will go in with three tiny cuts, so its not so bad. The swelling is the worst part. Oh...You do get good pain killers.