Yikes, Makena, you are YOUNG!! I was almost 13 at the 1958 convention in NYC. Eight days was a long one. You have a rich history, don't you??
I was there in 1953 too. And the one in 1969 was 8 days in Vancouver BC, where we went. I was pregnant with Princess at that one. I think there may have been others. The one in Pasadena in 1963 may have been 8 days, but I was forbidden to go to it by my doctor. I was pregnant with my first baby, and barely 18............married, yes.
I remember really enjoying the conventions. My memory is that they started at 1:30 in the afternoon (or close to that time) and ended at 9 that night. You still had to get there early in the day, to get a decent seat. There was a meeting at 9 or 9:30AM for field service. Sunday it started earlier in the day, but got out earlier too. They seemed like long days, when you were taking a family there.