As mentioned stay late on the river, take a hikers light with you and stay on the river until you need it to find your way off - truly. Often the largest fish of the day for me has been during the onset of heavy dusk, although this year I have found this not to be the case - my largest fish this year have all been well before dusk/dark.
In the past I've had best success with PMD's or BWO's (< size 14). This year it does not seem to matter what type of dry I use (EHC, BWO, Royal Wulff), all have been catching fish - size does matter so keep the flies in the size 16 range.
As for where ... for me at least .. upstream of the golf course.