I'd put it on the "not good" list. in spite of it's size the average depth is roughly 4'. Presently there are warning not to have contact with the water itself because of toxic algae and e coli. And as Beaverfan said car prowls are on the rise in the area.
As far as bait I like blue ipods, or if your going for an oversize "prowler" a laptop usually does the trick! As far as cleaning them there are unfortunately unedible. There is actually a number your supposed to call when you catch one. They will come take them off your hands! PM if you want the number, but I have a feeling you already know it!
I usually just toss em on the bank for berry fertilizer! They are very oppurtunistic hunters and many of these same "prowlers" have been seen up on the Cowlitz in the fall snagging Salmon!