Gonzo. Fishing at Bonneville Dam during the peak Shad run will be successful, but could be challenging for the kids. It is literally shoulder to shoulder. Time your cast and retrieve just right or you will tangle the guys on either side of you. If you decide to go there anyway, set up with spinning reels, 4-8lb line, 1/2 ounce weight, 20" leader ending in 1/16 ounce jig head. No feathers or plastic on them. Red and white, or chatreuse are good colors. If they don't work try pink, green or gold. The water is deep there with a good current, hence the need for weight and timing. Throw it out, count to 5 and reel slow and within 3 feet of bottom. Watch the guys who are catching a lot. They are there every day, so they know what is working. Their weight size and countdown are key. Match their color as well if you can.