Took 2 trips in the 70's:
1) Easter break 1974? - drove from NJ, stayed off-site, did 2 or 3 days in MK, other days to Sea World, Busch Gardens, etc. I think the trip was close to 2 weeks from beginning to end.
2) 1979 - senior class trip - again, off-site, but did the Luau, MK for a few days, even swam at River Country and drove water mice on Bay Lake!
Michael