Wow. This looks like an awesome trip.
I'm planning ahead to a trip there next summer, so I have couple questions.
I've been told that gas is expensive - to budget $400 or more for the ring road. Is that what you found?
Did you find it difficult to find hiking paths each day, or did you plan ahead for your hiking? Same with campgrounds and lagoons?
I'm a good planner, but I'm finding it a little overwhelming to plan Iceland becuase there is so MUCH to do!