Restrangled, you could always try the all-over silvery look and then change it if you feel you're not ready yet.
The lighting in the bathroom where I work is the only place I can see gray hair. So about once a month when I see one laughing at me, I'll stand there for 30 minutes trying to pluck that one damn hair. And then, of course, act casual when anyone walks in. I wonder how the hairs get to be full length without my noticing?
My dad was almost entirely gray and then went on the McDougal diet (vegan with no fat, not even cooking oil). His hair turned back to black. I've always meant to do research about that, but never have.