Geoff and I remember our first trip to Dissaco when we had tried to contact M & J that we were on our way, failed to get any connection.  So with Margaret's clear instructions we were able to find our way and hiked up the hill to their house dragging our bags, only to be greeted at a closed metal gate by a surprised John - who was sitting at the table with Joanna in the garden - with " There's two 'derrs' at the gate " but failing to get up and let us in !  Fortunately, Joanna was on the ball and let us in.