According to David Gans, Not only was he very bitter in that book, they SAY it is filled with factual "liberties". I believe you are correct to take what that book says with a grain of salt.
For me, it's the official book of deadheads and Playing in the band. This is the next one I want to read...
No one spent more time with Jerry Garcia than roadie Steve Parish. Parish waited till Jerry was long gone to finally put his thoughts together in a respectful way, but with plenty of inside stories to keep us entertained. Look for a movie based on Parish’s book soon.
May God bless and keep you always
May your wishes all come true
May you always do for others
And let others do for you