Before heading out on the cross country trip, I stopped by the Fremont Service Department to pick up a few adaptors. I ended up buying five adaptors. The adaptor on the left is typically used in residential homes. My friend in Nashville has a plug like this that is used for charging heavy construction equipment.
The rest of the plugs are for charging in campgrounds. Apparently RV campgrounds have no standard type plug and you need to carry all four adaptors. I am reminded of the many adaptors I have for traveling throughout the world.
The final bill for these five adaptors was just under $200.