I'll chime in on this one.... I broke my femur 6 weeks ago last Friday. Went over the bars on a double and my boot hooked up somewhere in the bike. It was a complete break midway between the knee and hip. Ended up having emergency surgery to insert the rod. I started to drop the crutches at 4 weeks, and am completely off them now. I've found that a cane helps me with long hikes to the store, etc...
I can bend the knee quite far past 90 degrees, but I've really pushed myself to get where I am at. The Doc says I'm way ahead of schedule, which is good but it's still quite frustrating. Still take Vicadin to sleep at night sometimes, and IBU 3x/day.
Worst part is that this is the injury that is forcing my retire from motocross. It's been an extremely difficult decision, but just too hard on the family, work, etc.... I still very much want to race/ride, but I'm hoping that feeling will fade. I can't say for sure that I will not be back riding in a year or so though...
Good luck on your recovery.
(I'm 36, and have been racing 250B/Vet seriously for 2 years).
David.