We didn't have one back at my school in the dark ages when I was a senior. It doesn't matter, though, because there's no way in h-e-double-hockeysticks my parents would have ever let me go on one.
My late husband, on the other hand, got to go on his. He was graduating from a Benedictine prep school for boys entering the Catholic seminary and their senior trip was to Boston, where they got to see Bishop Fulton Sheen speak at a conference and then got to confess to him. Talk about a fun-filled senior trip, huh?
My current boyfriend went on his senior trip to New York, where he and a bunch of others got sent home in disgrace (big surprise....alcohol was involved) and didn't get to go to the prom and almost didn't get to graduate. I guess it took some serious groveling on his part to get to "walk" at graduation.
Ahhhh, the early and middle 1960's......