We went to Iceland last year for 2 weeks as a graduation present for our daughters. Our trip was the towards the end of May. It was truly a once in lifetime trip. We actually rented a car and drove around the ring road and stayed in different places along the way. If you plan to go this summer, I would get your reservations for your hotels as soon as possible. Summer is high season and hotels book up. We did the Blue Lagoon. It was touristy but don’t regret going. One thing we did that was different was taking the ferry to Grimsey and getting a tour by an islander. We saw puffins up close and took pic at the arctic circle. My daughters are horse riders so we also booked riding tours on Icelandic horses. We didn’t to the diving/snorkeling at Slfra. I’ve heard its beautiful.