Hi! So we're a group of one Icelandic girl, one Polish girl and one American guy who are driving from Reykjavík to North Iceland to visit Mývatn, Goðafoss, Ásbyrgi, Dettifoss and everything in between. One person got cancelled so we've got space for one more. The shared petrol will be around €35 EUR, I guess. We'll be camping (c.a. €6 EUR/night), you'll need your mattress and sleeping bag. We'll be sharing food as well, but I (the Icelander) will try to keep the cuisine traditional but edible!
If you're one person travelling in Iceland in the period 19th - 23rd July and would like to join, PM me :-)