The most obvious, and very unbiased scientific opinion, OTVARC is the best club!

Here is a short list of amateur radio clubs in the area
Portland Amateur Radio Club – https://w7lt.org/
Clark County Amateur Radio Club – https://www.w7aia.org/
Williammette Valley DX Club, Portland – https://wvdxc.org/
ORCA DX Contest Club, Vancouver BC – https://www.orcadxcc.org/

Here is a short list of local events
SEA-PAC – First weekend in June – seapac.org
Mike and Key Swapmeet, Tacoma- https://www.mikeandkey.org/flea.php
Swaptopberfest, Salem – October https://swaptoberfest.com/
Salem Hamfair & Computer/Electronics Swapmeet – April http://www.w7sra.com/

You can also look here for PNW ham events: http://www.n7cfo.com/amradio/hf/hf.htm