I've done the overnight thing in the DB there before and still couldn't get a good spot in one of the few holes. If you think snagging has been perfected on the Samish, then you need to hit the this one during the peak of the run. We woke up one time to people standing on the bridge pointing out fish to their buddy on the bank who was holding a halibut rod with a spinning reel on it. A chunk of lead and a big treble was the lure of choice, these guys hooked a bunch of fish and never landed a single one. They would hook it in the butt, it would turn and head down stream a couple hundred feet, then break off with 50 feet of line behind it. We watched these fish get caught down river in the next hole by getting the line wrapped in somebody's rig. Out of the dozen or so fish we saw caught that day only one was hooked in the mouth.
We tried to be polite and stopped well above a hole to see how people were fishing before continuing down river so we wouldn't get in their way, apparently this wasn't the correct thing to do, because they started yelling at us almost immediately. The whole time we watched this hole they yelled at every boat floating down and at each other every chance they got. This was the last time I floated it.