We went away at the end of of May in our camper van and stayed near Bamburgh Castle, but during the day we were out and about. On one of the days we made the trip (pilgrimage??) to Holy Island (or Lindisfarne). We’ve been a number of times before, and always made the effort to be there long enough that the island empties of most tourists as the tide comes in and the island becomes, well an island again! The only (slight) downside to this is that most of the shops close as well, but it does mean that you can get a table in one of the pubs for dinner with the minimum of hassle.