Ah, that's multiple trips. Gotta get back into our routine of at least 1 per month now that we have moved house.
This is our 2nd trip, we went in April last year. Booked a Whale Watching cruise with the fantastic Elding (
Front Page - New | Elding Adventure at Sea) and had a somewhat unusual non-sighting, so they give you a voucher that's good for 2 years to go again. A good way to do it is go early in your trip, so you can then re-book for the next day or later in your trip. We did ours from Reykjavik, but we're using the voucher to head up to Akureyri and do one there instead. Fortunately only a short hop from LHR for us to get there. We did the Southern part of the ring road last this year, but next year we're going up north and then working our way back, doing some hiking along the way. Kirkjufell for example, is pretty well known.