Another crucial influence, at least on Don, that links back through to the Byrds, is the Dillards. Don was encouraged by Rodney Dillard to get out to California and try his hand. The Dillards then have ties to The Byrds, The Burrito Bros., etc. As has been mentioned, Bernie studied banjo with Doug Dillard, we all know his role in Dillard & Clark. I'll have to find the reference to Don & R. Dillard and post it. I read it recently, but can't remember exactly where right now.