Springers start showin up in late Apr.,May but the bulk will be in June and July on most Columbia tribs. The Sandy has a good run of Nooks (and judging by your latest posts you`ll do just fine) and so does the Clack.
I really only bump up to 15/12 for `em, I want the bite more than anything else, losing fish is just part of the game.
Eggs, spinners 5 & 6`s, even my flies catch these brutes.
Winters are a rain fish, depending on where you fish `em. Late Dec. can have fish but Jan. - March are the shizzz for me. My favorite time of year!!