I agree the Catalina 22 is probably the most produced and by now refined design you can find. I also expect there's a strong class organiation in the Seattle area. It's perfect for Lake Washington and the lower Sound. It's not a big water boat and it's best to respect that. I wouldn't take it up into the Straits or in the northern sound when it's blowing. The great thing about a trailer sailer is that you can drive it to interestng spots like Willipa Bay, warm water lakes etc etc. With the board up you'll get into waters that you'll have to yourself.
You'll need a reliable outboard. Even in good weather you'll have the tide.