Live reputation, At Fillmore East, and breakthrough (1970–1971)
The band played continuously in 1970, performing over 300 dates on the road traveling in a Ford Econoline van and later, a Winnebago, nicknamed the Wind Bag. Walden doubted the band's future, worrying whether they would ever catch on, but word of mouth spread due to the band's relentless touring schedule, and crowds got larger. The close proximity of the Winnebago brought about heavy drug use within the group, and all in the group, with the exception of the brothers, were struggling to make a living. In one instance, touring manager Twiggs Lyndon stabbed and killed a promoter for not paying the band; he later cited temporary insanity.