It depends....now thats always a good answer! If I'm just fishing two rods (My Wife and I) I will run with diver most of the time. I like the deep six version of divers. Last year I went to a line counter type or reel in stead of my old standard penn 209 reel. I check the deth and let out enough line to get the diver down to where it needs to be. If there are four rods I'll run diver on the back two and cannon balls on the front two. I put a slider on the main line and run a dropper line off the slider then add the weight. The other option I use from time to time is a side diver. It's a weighted diver that you can set to pull out to the right or left depending on where you want the line to be. I use the side divers on the front rods. Overall I prefer divers to weights in the lower Columbia because It's less hassle. I have less line to deal with and when there are lots of other boat that makes a difference.
When it comes to bait I run a whole herring on a nose clip with a large fin to get a nice roll. I seldom use plug cut bait, nothing wrong with it, I just have good luck with the nose clips. Most of the time I use spinners. I use a sze 7 to 7.5 blade and make my own. A good blade to use is a half white half redish orange blade with a brass back. It's called a half and half or some times a fire and ice. I also have luck with a red tipped white and brass spinner. Just remember those treble hooks have to be barbless. On the oregon side in Youngs Bay the Columbia County Sheriff Deputies were very busy checking hooks last week. I fish the area from Hammon to Rice Island and use the same methods. If there are four rods out we run two herring and two spinners. I avoid Bouy 10