It'd be fun if someday one of these NW events was set up so all performance boats could get together.
NWoffshore.com and Caleb have put on a great event called the Performance Boat Rendevous that isn't limited to any particular size boat but since it's saltwater, the Jets and V-drive boats shy away.
As it is, it appears that we have many well attended events around the area but are unfortunately most are size dependent (ie...big water big boat, shallow water small boat).
It would likely need to be close to I-5, have a sandy beach, some potential smoother water for the smaller boats yet have some open water for the big dogs to run.
Maybe the Columbia would fit the bill.....never boated there
Anyhow, food for thought............john