I use bee stings for a problem that I have with my wrists - I sting each wrist each week. Arthritis is a common example of an issue that bee sting therapy can help. The torn miniscus though... don't know. It can't hurt...well...maybe it can hurt, but just a little. I find catching the bees with a pair of forceps is a lot easier than with my fingers. I got my forceps in the fly fishing section of Bass Pro Shops.
BEFORE you start, I would suggest a couple of things:
1) Research apitherapy. There is a lot of information out there about it that you can find. You might even be able to find an apitherapist that you can contact.
2) Have an epi-pen available, particularly if your father has never been stung. Every bee keeper should keep and epi-pen available anyway. You will need a prescription from your doctor but once you tell him that you are a bee keeper he should give you a prescription readily
I hope your father gives it a try, it might give him some great relieve. I know that a friend of mine uses it for his arthritis and it really helps. The first sting is the worst, then it gets better. After about 5 or 10 he shouldn't mind the stings at all.
ps. My college (OU) roommate (Eddie Garrett) was from Shawnee, OK. Any chance that you know him? We went to college a long time ago, he is probably your father's age.