Shad will continue moving further north as the run progresses. Lot of online sites that have reports which will give you some indication where the main body of fish are and how far up they've made it. In general I think a good rule of thumb regarding water is look for deep pools immediately following faster moving water. Shad will tend to use these locations as lanes and resting areas on their migration. Look for pools before runs as well as they'll stage at times before running the rapids. Trial and error. Look for cars parked on the side of the river when all else fails, use other guys experience to cut down on the learning curve. If you find an area, maybe an island, that cuts the width of the river with fast moving water and some deeper pools, give that a shot. Again these fish travel probably over 100 miles, they're looking for the path of least resistance. It's an amazing fishery.