Txjole2 -- I have to respectfully disagree. There will be no regret from moorage over trailering in the Seattle area. However, you are correct that blisters (over time) can cause significant damage if gone un-noticed.
However... take care of your boat and enjoy it - that's why you bought it. I sure didn't buy my boat that in 5-10 years it's in brand new condition.
Benefits of mooring your boat (in the Seattle area at least).
1) Jump in and go -- no trailer mess with Coulon park there in Renton - besides - where do you park it now with the overflow parking having been replaced by a Lowes?
2) You will use your boat at LEAST twice as much. (Isn't that why you bought your boat in the first place -- to use it?)
3) Have I mentioned Seafair? Being able to enjoy the on-water yearly events without the hassle of the loading/unloading?
4) Have I mentioned opening day of boating season at the Montlake Cut without having the hassle of the loading/unloading?
5) If you haven't tried it, have I mentioned 4th of July on Lake Union without having the hassle of the loading/unloading late at night?
6) Again, you will probably use your boat at LEAST twice as much as you would if you had it on a trailer.
7) You won't have to worry about your drain plug

Seafair again. Blue angels about 150 feet over your head does not suck. Neither do unlimited hydro races either... Sure beats watching it on TV.
9) Watersports... You'll actually be able to do a little skiing, tubing or, wakeboarding during the week with your friends/kids/whoever! None of that trying to get off work early, rush home, pack up the boat, get it launched, park, race back to the boat, and only to then find a calm area to get some time enjoying the sweet water.
10) When the wife and kids are tired or grumpy from a long/hot day on the lake... you just park the boat and go home. No "honey, watch the boat while I run my butt off to get the car, then try to get it loaded up -- and all the while to keep the kids and your wife from having a total melt down.
Corrosion is going to happen. Blisters *could* too. Stay on top of keeping your hull clean... when you do pull your boat - give it a full inspection. You will be just fine.
Gosh, where's the rest of my list for mooring a boat in Seattle over trailering it...
By the way - the nice part is... you get the best of both worlds... If you want to head east to Chelan -- just load your boat and go -- you already know it's in perfect running order and that the drain plug is in!
