I spend a fair amount of time in the alpine that time of year and have harvested bears in early August. As already mentioned, variability in weather conditions between years can have significant influence on the stage at which berries ripen, or whether there's much of a crop at all. Secondly, while the bears love and prefer huckleberry with ripe berries, they also eat the green vegetation even when berries are under ripe or not yet present. I mostly hunt the Cascades, so maybe not as applicable over your way? Regardless, i hope you find success. Great time of year to be out!