A gypsy camp is a camp where gypsies hang out. Popular fiction often presents Gypsies as nomadic, so they travel all across Europe in their trailers and set up camp at different locales, usually for short periods of time
One Gypsy camp of note was seen in the 1941 horror movie The Wolf Man. The Gypsies set up shop for a brief period in Llanwelly Village in Wales. The local clergy was not exactly pleased with the presence of the camp. Larry Talbot, Gwen Conliffe, and Jenny Williams visited the camp to have their fortunes told. It was here that they encountered Bela, who also happened to be a werewolf. As the full moon rose, Bela transformed and murdered Jenny. Later, he attacked and was killed by Larry Talbot, but not before biting him, thus transferring the curse of lycanthropy. (Wolf Man, The)
On the TV series Buffy the Vampire Slayer, and its spin-off series, Angel, the Kalderash clan were a family of gypsies that lived in Romania in the late 1800s. In the year 1898, a group of vampires raided their camp, killing several of their number. Angelus murdered a young Kalderash girl, and as a result, the clan's elder placed a curse upon him. The male elder of the group explained to him that his soul had been restored, and that he would now relive the guilt, grief and torment of every evil deed he had ever committed. (Buffy the Vampire Slayer: Becoming (Part 1))
Angelus's progenitor, Darla, tried to force elders to reverse the spell under the threat of destroying the entire clan. However, Spike had already torn through them, taking away all of Darla's leverage. Frustrated, she killed the final member of the clan by snapping his neck. (Angel: Darla)