A portable, trapping system for capturing and non-lethally retaining a large number of large animals, such as wild horses or feral hogs. A specialized trailer aligns and secures deployable corral components for transportation. The corral comprises a modular fence erected on-site from multiple fence panels that are hinged together by pinning. The fence panels are configured with voids to prevent animal climbing. A circuit controlling a video camera communicates via cellular phone or satellite to remote locations for user-observation and trap control. A gate with a remotely actuated trap door is pinned between adjacent fence panels. The gate comprises a catch controlled by a circuit operated latch for remotely releasing the trap door via cell phone or Internet. A trailer with upper and lower aligned ceiling and floor channels constrains panels for transportation.