Ah ... Oregon shore diving is a problem. While there are a lot of nice places to shore dive, those conducive to rock scallops are pretty tough to get to. And with your 1 per day rule, it really isn't worth the work.
When we first opened our dive shop in 1981, rock scallops were abundant and fairly easy to find locally (Port Orchard). There was a shore dive off of Bainbridge Island that we called the "Train Crossing" that you could see hundreds of dinner plate sized monsters wedged in between the rocks. I took a group of photogs one time (back in the days of Nikonos II & III) and of course they showed their pictures and bragged about how big they were and let everybody know about the "Train Crossing" dive spot which is an adventure in itself. Within a year there were no rock scallops left.
That could be why the reluctance to post information on a public forum. Don't get me wrong ... I luvz my diver harvested goodies ... cabezon, crabs, scallops
... but hot spots should only be shared with responsible people that know better than to go in and wipe out an area. As you get to know the locals, you will be privy to more and more information. Your local dive shop has an old curmudgeon
that is FULL of information and, if you hang out enough, Steve may eventually let you in on his favorites.