Hi Steve,
Yes, I've been successful in the past by hitting the servers at (I think) 8am PST 6months before but its knife-edge stuff; last year I doubled up with a friend, we both tried for both of us and only one of the applications worked. Typically when I did trial runs last yr the permits were there and gone within a couple of screen refreshes (i.e. 1-2secs).

I'm looking at August. My fallback position is that since we'll be looking at an 8-day hike, we should be ok to get a walkin so far ahead of the exit date, but would still be nice to know if there's reliably a few spare exit permits.

Thanks.