I never heard of any actual Neil sightings, but it was generally agreed upon in the family that he must have been a decent fellow. And when he showed up on The Johnny Cash Show in 1971? Well, his status was confirmed: Neil Young might have needed a haircut, but he was good people. (And check out the standing ovations - Johnny's audience certainly agreed.)
"Needle and the Damage Done" and "Journey Through the Past", from The Johnny Cash Show, 1971.