It is true.I've seen documentaries on it....I'll try to find something for you..
One persistent legend about Camille states that a hurricane party was held on the third floor of the Richelieu Manor Apartments in Pass Christian, Mississippi that wound up in the path of the eyewall as it made landfall. The high storm surge flooded and destroyed the building, and there was only one survivor to tell of the story of the 21 others. Who the survivor is, how many party guests there were, and just how far the sole survivor was swept by the storm varies with the retelling.
In reality, most of the people that stayed in the Richelieu Apartments survived, and there was no party. Residents, exhausted from helping to prepare the town to weather the storm, took refuge in the building not out of recklessness, but because it was believed to be one of the sturdiest buildings in the area. Survivor Ben Duckworth is quoted in Hurricane Camille: Monster Storm of the Gulf Coast as stating that the Richelieu was a designated civil defense air-raid shelter. However, their faith in the building's sturdiness was unfounded, as it was completely demolished by the storm. Twenty-three people are known to have stayed in the Richelieu Apartments during Hurricane Camille, but only eight died.
The mythical hurricane party has been referenced several times in pop culture, and formed the basis for an episode of Quantum Leap titled "Hurricane".