Today I returned from a very fulfilling trip to Iceland. I will put my 11-day itinerary here as an inspiration, maybe @Randi & Svein who visited 2 weeks before me could do also with theirs? It has similarities but also is slightly different. I used a 2WD rental car for my trip and completed the full circle on the Ring Road anticlockwise.
Day 1 - Flight Icelandair Amsterdam - Reykjavik. Overnight Reykjavik.
Day 2 - Full day in Reykjavik. Overnight Reykjavik.
Day 3 - Superjeep tour to Landmannalaugar/Fjallabak TWHS. Overnight Reykjavik
Day 4 - Vatnajökull WHS. Overnight Skaftafell.
Day 5 - Ingolfshofdi Puffin tour plus some more Vatnajökull. Overnight Skaftafell.
Day 6 - Long drive to Myvatn with a lunch stop in Djupivogur. Overnight Myvatn.
Day 7 - Full day around Lake Myvatn TWHS. Overnight Myvatn.
Day 8 - Whale watching at Husavik. Turf church Víðimýrarkirkja and turf farm Glaumbaer TWHS. Overnight Hvammstangi.
Day 9 - Thingvellir WHS and rest of Golden Circle (Geysir/Strokkur, Gulfoss), ferry to Westman Islands. Overnight Heimaey.
Day 10 - Surtsey WHS and Heimaey. Ferry back to the mainland. Overnight Keflavik.
Day 11 - Flight back home.
In hindsight, 11 days were pretty perfect. Everything between 10 and 14 days is good I think. With extra days, I would have liked another day at the Westman Islands and incorporate a sightseeing flight above the Vatnajökull icecap and glaciers. With less days, I'd consider skipping the east and northeast (everything between Jökulsarlon and Myvatn) as I found it the least interesting.
Of course I will add reviews of the WHS and TWHS in the coming weeks. More detailed day-to-day reports can be found on my Dutch language website: https://elsslots.wordpress.com/category/reisverslag-ijsland-2020/?order=asc