[MENTION=2612]JDiver[/MENTION] -- Many thanks for all the helpful information. I do have a question: We will be staying for four nights in Reykjavik, and a big part of our stay will be to get over two red-eye-induced jet lag. For sure we don't want to do anything too ambitious our first day there, but afterwards, I'd like to purchase a day trip along the South Coast. Do you have suggestions for companies that offer this experience, and how far we can realistically go on a full-day tour with a return to Reykjavik?

Many thanks!