Salmonberries tend to fruit early, even before thimbleberries, around the same time as huckleberries in June. The tender shoots are edible, but there's not much meat on them, and blackberries are by far the better shoot. On the caneberries bearing thorns, it's necessary to peel the skin to remover the thorns, and that process doesn't leave much of salmonberries to eat.
I was unaware that bracken was edible. I was told the spores were toxic and carcinogenic by someone somewhen, so I never considered it for a food, although I reckon when they're fiddleheads they're not sporulating.
Thanks!