Steve is correct in remembering that I'm planning a rim to rim day hike. It's scheduled for Wednesday, October 3.
I've been procrastinating a little on jumping in on this thread, sort of looking for when I'd have a little time to type things out.
The planning and preparation for the hike are legitimately part of a "trip report", and that's what I can address now, and it will hopefully be informative to others considering this hike.
But -- I'm procrastinating again right now! Hope to have a little more time tomorrow to pitch in!