Steve, I don't know if you are aware of the PCT_L, the listserver, but it is a place where info flows. For example, today I saw this post, relating to southbound through-hikers:
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"I know the SOBO are not yet to the Suattle River detour. But as soon as anyone
has information that the 'log' is still in place, please let me know. I start
SOBO from Manning Park on July 21st headed to Cascade Locks.

Thanks,
Rodney Mruk"

http://mailman.backcountry.net/pipermail/pct-l/