Dennis,

I agree that Colorado waters allow for spacing, although it can get relative tight on the Frying Pan (say 60' apart) or at the hog trough on the Taylor.
But I disagree about telling what fly you are using.
If someone on the water is tearing them up and I'm getting skunked, I'm going to be grateful for unsolicited advice. I have even been given a fly by a fellow fisherman that saved my day.
On the other hand, what chaffes me royally is the guy that is tearing them up, not close to me, and refuses to let me in on the secret when I ask politely. I'm not asking for his first born, just the pattern that the fish are hitting. Not like I'm going to take his fish, either.