A photo service system according to the present invention is structured in an area such as a theme park. In various forms, the bowel retractor devices are configurable from a collapsed position wherein the retractor may be inserted through a trocar cannula or other opening in a patient’s body to a second expanded position wherein at least a portion of the patient’s bowel may be advantageously supported in a desired position. The test compounds are linked to the solid support via cleavable linkers and may thus be released from the solid supports.