Geo,
Hopefully, you have some opportunities to hunt that dont involve running with the youngsters. It is common on pheasant and deer hunts in this part of the world for the oldsters to block the ends of driven fields, taking what comes out before the people pushing it. This give guys an opportunity to avoid being dedicated camp cook for a few more years, if nothing else.
I would tell you bravo on having a clear mental picture on what you are, and are not up to at the moment. Perhaps you will see some improvement that allows more participation, but, participating in some is better than none.

Best,
Ted