Port of Camas
I launched from Port of Camas Washougal last year without incident. There is a good dock on the downstream side, the gradient is fair, and the current is not strong. BUT make sure that it is not a busy time. There can be lots of Dory boats. - Rob N
Vancouver Marine Park
I've launched boats at the Vancouver Marine Park boat ramp.
Should work fine this time of year.
On a J/24, probably need to use a rope attached to the trailer / tow vehicle to get the boat far enough into the water to float off the trailer, without drowning your vehicle.
Back trailer down to waterline, chock trailer wheels, attach strong rope to trailer and vehicle, disconnect from vehicle, take up tension and remove chocks, back trailer into water.
On single axle trailer, make sure boat is balanced so it will not tip backwards when disconnected from tow vehicle on the ramp incline.
Use the downriver dock, and the current will hold the boat to the dock. - Stephen E
How Not To Launch a J24
And lastly an example of how NOT to do it!
Got any other tips? Then leave a comment below.