If you don't take or rent a whitewater kayak out there, you will be punching yourself in the head every two minutes, which is about how often you'll see something you want to run. The Pac Northwest is whitewater mecca. If you're anything like me, you'll want to move out that way after you visit (I'm moving to OR this summer). There should be plenty of options in April, given the only month that typically really sucks out there is Septemberish, and there's usually pretty good snowmelt runoff by April along with the typical rain. I'd check out http://oregonkayaking.net/
. You can look at river/creek descriptions throughout BC, Washington, Oregon, as well as check their flows. The write ups are great and have good photos of the runs listed. You may be able to find paddling partners at http://groups.yahoo.com/group/seattlekayaker/
. American Whitewater Association is always a pretty good resource too, http://www.americanwhitewater.org/co...mary/state/WA/
, and I guess it all depends on how much traveling you're planning on doing. Definately spend a little time (weekdays preferred) on the Olympic Peninsula/Oly Ntnl Park...it's an amazing place. My only recommendation for a IIIish river to run would be the White Salmon, BZ Corner to Buck Creek (write up on the AW page I linked), although if you're staying between Seattle and BC this may be a bit farther south than you want to travel. It's pretty much class III with a small falls at the end that is easily walked/scouted. It's a popular run, and it runs most of the year, so it's usually easy to meet up with a group if you're by yourself, and if you're with folks who know the run and point out the line on the falls, I think it's pretty easy and fun to run it...feels like a IV, but you'll get spanked if you're off your line. Have fun...I love it out there.