Drachir21,
I'm sure they will be a pot luck/get together on Saturday night, just bring what you feel like. I don't think there is any A to whatever bring this or whatever to Z bring that. As for the directions just go across the Wynoochie River bridge on Hwy 8 and take the first left, that is Aldergrove and it jogs into Katon, just follow it and you will get to Friends Landing.
Good luck and tight lines, Jeff
PS,
The new avatar I put in is a sample of the fish, it is a Chehalis silver from last year taken on a spinner below the mouth of the Satsop.