Dear neethi86,
Here you go:
Day 1:
Land in the AM. Pick up car from Keflavik Airport and go to lodging in Reykjavik. Blue Lagoon. Stay at Reykjavik.
It is okay.
Day 2:
Golden Circle Tour - Thingvellir National Park (Silfra fissure, Oxararfoss waterfall), Geysir in Haukadalur, Gulfoss waterfall. Optional - Laugarvatn lake, Kerid crater, Bruarfoss waterfall. Stay in Selfoss.
Yes, this is a good plan.
Day 3:
Eyjafjallajokull, Seljalandsfoss, Skogafoss, Dyrholaey, Reynisfjara Black Sands, cliffs, sea stacks around Vik. Stay at Vik.
Perfect. Day 4:
Fjadragljufur (feather canyon, waterfall at the end), Skaftafell Natural Reserve - Hidden/Black/Svartifoss Waterfall, Svinafellsjokull glacier, Jokulsarlon Glacier Lagoon, Diamond Beach. Stay at Vik.
Good.
Day 5:
Drive back to Reykjavik, and head to city tour, whale watching, puffin tour. Stay at Reykjavik.
Good planDay 6:
Pack up and drive to airport.
As your itinerary is right now I do not see the possibility of going to Snæfellsnes. Please also let me know if a 2WD car is sufficient for this itinerary.
Yes, you can. No problem.
Best regards,
Berglind
Iceland24