@BriGuy and I got into a bunch of what must have been pre-spawn or straight up spawners on a lake you know well last April, if memory serves (questionable). The shallow, weedy coves were good action for bluegill, a couple bass, the odd trout, and especially crappie. Not much of size, but BriGuy got a largemouth that was probably about 2 pounds. Standard, smallish trout streamers, cast to visible breaks in the weed lines, were getting bit regularly....
Like you, I doubt 60 degrees is the real threshold around here; most of our lakes don't get that warm until late May/June. That said, the warmer, the better has been my general experience, and I always try to find a way to fish on especially warm spring days. Gets the bigger bugs popping, which ignites the whole food chain. This spring is shaping up a lot like last year so far (cold), so I would expect the spawning to be on the later side, but we'll see....
I don't know any hot spots, but I can say that most lakes that have bluegill and bass seem to have a few crappie in the mix as well. I tend to catch more (on purpose) in the summer. They (and all spiny rays) are suckers for a pheasant tail soft hackle. I haven't tried it, but I bet a damsel or dragonfly nymph would be deadly in that weedy water they live in....
