Unique Ways to Explore Iceland in 5 days - Jun 21 - Jun 27, 2017

The accommodation near Vik, Sólheimahjáleiga Guesthouse , was outrageously expensive for what it was , and compared with the proper hotel the next night, Litli Geysir Hotel

You should add the Lava Centre to your itinerary. http://www.lavacentre.is/ We enjoyed a hour or two there and it provided some useful information about the thermal region. One of the useful titbit was to watch for the dome to form in the geyser before it erupts: