The campground we are working at recently had an incident like this. I really wasn't involved in much, but the grunt work, but here is what I understand happened. Camper complained about his power, (don't know what the issue was), the CG owner checked the pedestal, and it was putting out the proper amount of power. Camper continued to use the pedestal, and sometime later was having problems again & called the CG owner back. Don't know exactly when it happened, but the plug was disconnected from the pedestal, and it was fried. Didn't see it, but sounded similar to your's Erika. The camper then stated that the last campground there had been some sort if issue with the plug-in surge protector. End result; camper had to replace his electrical cord, and we had to dig up & replace the pedestal with a new one.
On top of that heard today that there was a rocket scientist in the same site, who couldn't open the box to plug into the new pedestal, so he broke out his hammer & pry bar, and now the lid is totally messed up. Hope we don't have to replace it again!!!