Name
Name
Drop-first decision
Guide / live check
What changed: low cloud or poor visibility has removed the hilltop-view part of the trip.
Drop first: the separate journey if the view was the only reason for going.
Keep: Perlan if its indoor exhibitions were already the main reason.
Check before leaving: the direct exhibition information, visibility, and the live return journey.
Reykjavík plans usually go wrong by keeping too much, not by starting with too little. When wind, rain, a late check-in, or tired legs cut the usable day, protect one good main activity and remove the part that creates the most movement.
This is a drop-first list: seven common situations, the piece I would remove, and the part I would keep. Check the live weather, opening hours, and transport before leaving.