Please welcome Eyoyo Underwater Fishing Cameras.https://amzn.to/3siEgXn
you have to figure out what kind of fish you are after, each species prefers a different structure(i.e. bass like weeds, rainbows will be at sandy bottoms). Figure out what your targeting, look at a map then go search. When u find the area your looking for drill some holes, if you get nothing keep drilling. It usually pans out