The socket was with us every day in the campervan in use. Usually only two sockets are freely available - and the one you need for heating, toasting, cooking.
The bar is small enough even in a backpack to have space and light enough for the plane. Together with the correct adapter (in our case, the Segula Skross Travel Adapter Australia) a perfect team. Note: there are other adapters that have a wide plate above. Then only one adapter fits into the socket of the Campers.