Ok, after I listened to Manilow songs on youtube, I searched for other songs from my childhood, found Puff the Magic Dragon, and have since been reading up on Peter, Paul, and Mary.
I didn't know Mary was from Kentucky. And, I also didn't know he created an organization (The Public Domain) and gave the song to it, so it could earn money for charities. I remember when I was a little girl (6?) going to Jelly Stone Park with my mom and brother. They had a little shelter thing with a juke box in it. My mom was outside with my brother and gave me a dime or quarter (can't remember now what it cost - probably a dime) so I could go play a song. I chose The Wedding Song (being a romantic little girl), even though I'd never heard it before. I thought it was absolutely beautiful, but I couldn't remember the exact name and for years called it "The Marriage Song." My mom had no idea what I was talking about.
I still love that song. Wikipedia has this to say about it: In an article for Guideposts magazine, Stookey wrote that the song came through him originally in the first person, Jesus speaking through him ("I am now to be among you/At the calling of your hearts/Rest assured this troubador/Is acting on My part"). The "troubador" was, of course, Stookey. However, Stookey felt that people might misunderstand, might consider him arrogant or they might be confused, so he, with God's permission, he felt, changed the lyrics.
Never knew that, either!