The Grateful Dead, Warner Bros-Seven Arts artists, bowed out of a late July stint at the HIC. An early 1969 date now looms.
None of this turned out to be so, and the Grateful Dead did not play Hawaii until January 23-24, 1970. I do not know if Honolulu International Center (HIC) was the same as Honolulu Civic Auditorium, but I suspect it is so.
This at least partially explains the absence of late July 1968 dates, after Kings Beach Bowl on July 13 (the next gig is August 2 in San Diego at The Hippodrome).