July 4th weekend 1977 - North Lake in the Catskills, New York
We borrowed a 9x9 tent and an air mattress, and all four of us slept in the tent, on a single air mattress. The combination of the family induced rocking mattress, over indulgence at dinner, and the wind blowing through the trees led to sea-sickness. We arose at 3 am and walked around for a while, singing "Plop, Plop, Fizz, Fizz, O what a relief it is." It seemed to help.