Read most of the replies when got home from surgery, re-read now and think I'm coherent enough to respond! Turns out there were 4 pieces of bone so surgery was definitely a good option. For those who have to choose, I'd say do you want to trade a few weeks of piercing sharp pain when you move wrong (no surgery) for what I think will be a few days of a dull continuous ache in your shoulder/neck like it was hammered (surgery).
Thanks to all who responded; I'm encouraged that my attitude is reinforced by many of us here: keep going but be careful. That's what bugs me the most about this crash; I have no idea how it happened. I'm anxious to return to the scene to figure it out but DW has me on a short leash and it's a 2 mile hike in to the location and 2 back out.
I'm not doing the exercise for longevity (directly). It's to feel good and be healthy, which at the level I'm at works for me (~5-6 hours a week). It's a pleasure to get queried by nurse for surgery and be able to say no meds, BP good and so forth. Used to donate platelets monthly and they gave a courtesy post card with cholesterol, I could just about predict it based on exercise I'd been doing. So apparently Mom and Dad did their part (genetics) and I have to do mine by getting the exercise. DW and I are very fortunate in many ways, health being only one. Hope all have a good weekend, or at least for those to whom weekends are still significant markers!