Winnepesaukee sounds good to me. I'm not familiar with the area, so we'd have to defer to someone else to be the meister for that location. But the chance to tangle with 5 pound smallies in clear water would make for a great clave.
I also have some problems with the end of May (wedding anniversary), but depending on the severity of the winter and how late the thaw is, we could conceivably have this clave as late as the second week in June. There's a good chance that there would still be some hungry post-spawn fish at a decent flyrod depth.
Fun to think about!