The Fall River is good fishing for the most part, with high fishing pressure in the afternoon especially near the hatchery. 
Early AM and late afternoon to dusk will be great times to enjoy the river with fewer folks around. 
Afternoon hatches though are on point with PMD’s, Olive Caddis and Midges creating most of the fun dry fly action. 
Rusty Spinners and Tan Caddis for evenings, and don’t forget the little streamers and leeches for the river any time of the day.