We like the Surge Guard #34951 and the remote #40301. It is portable so you can check the power at a pedestal before you unhook and then monitor your power usage with the remote. Never had a problem with it walking away and have used it on 2 different toy haulers.
Available at the following location - they have great videos and excellent customer service.
https://www.technorv.com/surge-guard...al-protection/