There have been many threads here in the past questioning if Disneyland has/had "hard ticket" event nights on New Years Eve.
Falling into my lap from a dusty old envelope are my ticket stubs from the 1975 (left) and 1977 (right) "Advance Purchase" tickets:
You had to pay more money if you purchased the tickets on the day of the event (which rarely was possible anyway, as this event usually sold out in advance).
And while unable to yet locate a 1970 ticket stub, I did find the Ticket Agency receipt (you used to actually go to your local Ticket Agency to acquire "Advance Purchase" event tickets to Disneyland in the "old days")...that indicates a 1970 price of $9.00.
FYI...these tickets also had "Free Parking" on the back.