In reply to alpinestar_no1:
I went at easter in 2015 and it was fantastic, but we were there a few weeks too late for it to be best for climbing, there are some PDFs out there but they aren't that easy to find (we managed to get in contact with some folks out there).
We had a jeep and slept in that which was just about tolerable, i wouldn't commit yourself to one area as you'll miss out on so much of the country doing that! we found good ice on the west coast just inland from the snaefellsnes peninsula and a lot of potential but lack of conditions in the northwest fjords (bildurdalur and isafjordur)
I can try and find the PDFs we had, though they arent extensive!!