Sorry to hear that Doc. I have been fighting the same thing for 30 years. MRI showed three bulging discs in my lower back. I feel your pain.
But hey, I still have my bride of 60 years, and enjoy every day to the fullest. Just do not do some of the things I use to do. I have to do things in spurts. One thing I am fortunate is that if I set down for a minute or two the pain is gone.
You mentioned mowing, I have about an acre to mow and traded my John Deere lawn tractor for a new zero turn mower a couple of weeks ago. Much easier to mow with and a lot faster. I have learned to make things as easy as I can. My back has been slowly improving again, so maybe I will be able to fly again. I can only hope. I sure do miss it. And all the people that share the same interest. That is another thing. Traveling for long hours and I can hardly move.
But I can still ride my Harley for a half hour or so without pain. Go figure.