We just had an "interesting" (in the bad sense of this word) encounter at an Arizona campground.
Because of various issues (poor sat reception, not level), we had to try 4 campsites before we thought we had found a suitable site.
However, when I checked the power pedestal with a Surge Guard 44270, it indicated an Open Ground. To make sure, I plugged my RV directly into the pedestal and my hard-wired Surge Guard 40240 indicated the same error.
I found open ground errors on two pedestals. So we decided to leave.
The office reaction was total denial -- "We don't have a problem" blah blah blah. Apparently, if RVs aren't bursting into flames or people aren't being electrocuted, then the electrical is "ok".
Anyway, I think what surprised me was the reaction of a couple next to our site -- When they saw me checking the pedestal with the 44270, they reacted as if I possessed some sort of alien technology. They had heard of surge protectors, but this appeared to be their first "close encounter" with one.
This got me to thinking . . . do MOST RVers NOT have surge protectors/indicators, etc?