[flybouy]

GFI is a MUST. It's a safety issue and a code requirement. Also be very aware of how you run the wire to the outlet. Unlike your house, the trailer moves, vibrates and bounces down the road so running the wire unsecured near exposed screws, staples, sharp edges etc. can result in disaster. It's a simple install for someone skilled so if you are not familiar nor comfortable working on electrical wiring then hire a professional.