QUOTE(Kirk @ Jun 14 2011, 08:03 PM)
I suspect that the real question is about the availability of 30A outlets. ToddUK, the reason that you see parks state that they have 50A outlets is because not all parks do.But I have never seen any commercial RV parks here in the US that did not have 30A outlets as a standard part of the RV hook-ups. It would be very unusual to find an RV park that has 50A outlets and not 30A.
Camp on the Heart RV Park in Dickinson, ND has a 30-amp section and a 50-amp section. The 50-amp section has only 50 amp connections on the pedestals, but the park lends campers the appropriate adapter if they want to park a 30 amp rig in the 50 amp section.
A few years ago, we stayed at a park somewhere near Niagara Falls that had only 50 amp connections on the pedestals, but that may have been on the Canadian side of the border.
You are absolutely correct, though. It is rare.