is there a good source  for lake maps, particularly interested in Silver and Potholes  thanks

The maps you can buy at most tackle shops have the Potholes map. I think they are made by "Hot spots" map company or something like that. They don't make one for Silver Lake though. I think the only maps by them for Washington cover the Sound, Columbia river, and Lakes Washington, Sammamish, Potholes and Banks. Those are the only ones I can think of off the top of my head.