Having tried a number of times in Elwyn Forest, I followed some advice and went off to Venomweb Vale in Tirisfal Glades. Passing westwards through the Bulwark, I got the first ten before I even got over the ridge into the Vale, and I could quite possibly have got 50 or 60 in total.
It helps that there's a nice area with everything non-hostile being a turkey, unlike Elwyn. And that there was nobody else hunting at 9:20 in the morning.