I used to fish the Jacks Fork 2-3 times a year, sort of fell off the wagon with the whole trail rides/e. coli issue and watching folks misuse ATVs. It was decent fishing, caught plenty of 10-14 inch fish, and each trip caught one or two fish from 15-18 inches. Fishing always seemed more consistent very early in the morning, and well after sunset, from what I remember. Stow your rods and enjoy the scenery during the day (especially this time of year, with all the trees flowering), and bust them out when you get to the campsite