There's a really good documentary on campbell called "I'll be me". It has some retrospective material but was filmed mostly after he was well into dementia. It was touching to see how he was cared for and how he stayed pretty happy even as the confusion grew. I was dealing with my own mother's illness at the same time so maybe it was special for me but i think anyone who liked campbell would enjoy the video.
http://www.imdb.com/title/tt2049586/Also: Cheesy rhinestone cowboy video but the song is great
https://www.youtube.com/watch?v=8kAU3B9Pi_U&list=RDEM5Z7LdAQhPpaGVhL0qnTCQw
