Homeowner wants a 30 amp 125 volt trailer plug out by the driveway to power up the camper while its sittin in the yard.We will have to trench out from the house and mount the outlet on a post next to the camper.Does the 30 amp 125 volt plug require GFCI protection.We plan to run pvc out from the house to a 2-gang bell box with a bubble cover to protect it from rain.