Thanks for your reply Steve. I checked my spam folder, but didn't find it there.
While there seem to be many unused permits in the list at the time we would be there, I was wondering if they were unused and open to walk-ins, and maybe there were more walk-ins than unused spaces; or if they were never used. I'll ask when I call later.
Even so, I'm pretty sure I can work 3 extra days into my trip and we decided we would go anyways, and try our luck.
K