A Standard rig is #10 lime green corkie (peg it in place) + 1.5" of orange or pink yarn in the bait loop (doubled over so the actual length is only about 1/2 of the 1.5"), shrimp Smelly-Jelly smeared on it, 1/0 hook, 20" of 12lb. Maxima Ultragreen leader, 15lb.+ mainline, plus a slinky weight. Don't fish this rig in slow water (use the float-rig below.) Pre-tie at least EIGHT different weights of slinky, as determining the correct slinky weight can really make a difference. Have at least 5 backups of each size, since you might lose a few.
Or float fish with no corkie, 2" of colored yarn, pencil-lead, and just enough distance to the float to keep the offering near the bottom.
If you have a boat, back-troll bait-wrapped Kwikfish in around K14 size in purples, chartreuse, or pink...all with a silver background. If you don't have a boat, then get one...you'll catch way more fish, and/or get away from the crowds more!
By far the quickest way to learn locations is to watch other fishermen, and see which ones are catching the fish....sounds too easy, right.
I usually don't catch very many chums in areas that I don't see them jumping...sounds simple, but many people stick to one spot even though they aren't catching anything and don't see very many jumping. I look at about a 100' stretch of my side of the river and I'll often move on if I don't see a chum rise in that section at least every 40 seconds or so.
Each river seems to have about a 19 day window period for the best fishing...learn this three-week period...(whoops, it's not even three weeks usually!!)...learn this 19 day period for each river you fish. Prior to the 19 day period there often aren't enough fish to have the very best fishing...after the 19 days the fish get a bit too old to put up a great fight...at least in my experience in rivers.
Also, use the "search" function on this board (for "chum") and you'll find more info than you'll care to look at.
Go to the following web site and try to fish when the flows are 'correct' (different for each river) with the main intention of trying to figure out how to not go when visibility is under 2', and not going when the river is "real low and real clear". About 3 days after a nice rise in water level is a good starting point, if the river is dropping.
http://wa.waterdata.usgs.gov/nwis/current?type=flow