We drop shot at niagara river at times, easier to execute when water current was not as fast, depending on how much the city releases the water during the day. since the boat was already moving with the help of the current of the river, we ensure our lead weight always tick the bottom, line presented. as vertically as possible, to feel the leadweight bottom bouncing, if we felt a tug, it could be a fish or potential hang ups, so we automatically lightly set it. For fishing water under 15 feet, I would suggest using baitcasting reel, then use stiff but light rod, with 1000 size reel spool, for lightweight sensitivity to subtle bite, then 4-6ft flurocarbon leader on braided line. Many subtle tap-tap bite could even be a 4 lb bass. These are the times when bass were not too aggressively feeding, but would take the lures, since it was presentation in front of their view range. Why use baticasting reel? Easier to release the line when water suddenly change to deeper depth, so we watch the fish finder every so often for terrain changes. If the area has big boulders or rocky, creating more potential hang ups, we ensure our line are place as vertically as possible beside the boat,Then we retrieve our line again to shorten it when it gets to shallower depth, ensuring the line is again vertical , or the lead weight will get snag when we least expect it. So constant adjustment of line length, shortening and lengthening, and setting it with a tug is important. lines in an angle harder to unsnag during hang ups. Leadweight size could be from 3/8 to i oz depending on depth.
Another option is to use 1/4, 3/8oz to 1/2 oz jigheads (depending on depth)with grubs, tubes, bucktail jig. or fake minnows, and just bottom bounce your presentation vertically while the boat moves slowly. We used this method if the bottom is rocky and not a lot of weeds. You can cast farther and let your lure sink if the area has less snageable bottom structure, to get potential fish not close to the bottom.