Don't know whether you're looking for more complicated methods (fly fishing, etc.) or something more simple. I've always found that a 1/8 oz. white round-head jig would catch everything that swims in that stretch of river, including smallmouths.
Just cast & retrieve - easy for anyone to master. Accurate casts help to get close to structure. You can also experiment with how much to let the jig sink. Snags will happen but that's fishing.
If you'd prefer to target larger smallmouth, we used to kill them with texas-rigged 4" worms. Brown (motor-oil) with an orange curly tail were the most productive. However, if you're not experienced with plastic worm fishing, it's not a lot of fun. But if you do have the "feel", then being able to cast a snagless-rigged worm across logs is a good way to find the bigger fish.