Originally Posted by randyflycaster
I guess I still don't see why upstream nymphing shouldn't be done with slack like and an indicator, as that will reduce drag.
Some purists see an indicator as unappealing, and prefer to catch fish without one. More power to 'em, but I prefer to use an indicator and a slack line.
Every nymph presentation has a time and place, though. If you can master many different presentations, you'll have more tools at your disposal to catch stubborn fish.
I highly recommend "Nymph Fishing for Larger Trout" by Charles Brooks. The author primarily focuses on the larger western rivers, but he does discuss many different techniques that can be employed on all sorts of waters.