Hello- We were out camping at the state park this week and woke up one night to shocks every time we touched metal on the frame of the camper, including the door. I mentioned it to family who were staying at the next site over and they had shocks when touching the door and the ground (from outside). I asked our other neighbor who also received shocks outside his 5th wheel when touching metal. Knowing three of us had issues we alerted the ranger who sent out an electrician. They were pulling voltage from the ground. After playing with each of the three sites, when our camper was unplugged the issues stopped. They used a meter on our plug and we're gaining readings when touching one side of the plug along with the ground so they isolated it to us. I am not sure what might be causing this stray voltage from our camper but I am afraid to plug it in again. I checked wires and didn't see any frayed, etc. We have a battery on it now, no hot water heater or AC on this unit. Any ideas of why this might happen? Thank you in advance.