Thanks for your reply, and to those that emailed me personally.
I will be starting each tour in Reykjavik and driving to the tour routes:
July 8-15 between Vik and Hverageroi
July 19-26 between Reykjahlid and Sauarkrokur.
So I will have 3 days off July 16-18, and a few days off July 26-28.
I would like to take more time off, but I have heard that Iceland is very expensive, and so I fear that I couldn't afford to stay as long as I would like.
Any comments on how much it costs for food (stores, not restaurants)? I will be using a tent whenever possible, so accommodation should not be an issue.
John