Welcome to the board, i can't really answer your question on forney creek as i've never been there (it's on my to do list), but i can throw my input in on the other question. This time of year, your best bet will probably be bradleys fork simply to its lower elevation and, therefore, warmer water. Straight fork isn't that much higher so you may give that a try as well. As far as ravens fork goes, it's up pretty high so i'm sure the water will be very cold up there. FYI though, if you ever do decide to go to ravens fork, make sure and go when the water is low to normal. I wouldn't even think of going there when the water is up, you couldn't navigate the stream very well, if at all, plus it would just be downright dangerous down in that area.