While I'm extolling the virtues of Roadies, I should also mention that The Guardian had a piece on another aspect of musician support networks. Not that I'm suggesting this lady, the amazingly-named Lithofayne Pridgon, was a groupie, in the vulgar sense. She is one of those women like Pattie Boyd, Charlotte Martin or June Child who seemed to understand rock musicians and their odd lifestyles and ended up dating or marrying several of them.
Lithofayne Pridgeon was associated with Sly Stone, Little Willie John, and of course Jimi Hendrix. She also befriended such men as James Brown, Jackie Wilson and Marvin Gaye. It's an incredible life story, and the Guardian gives a long interview and brief overview of her life.
My favorite remains Pamela Des Barres, though, because she is such a sweetie. Also, she wrote a tell-all book, which always helps.