Most travelers assume Keflavik Airport (KEF) is just a small, cold gateway to Reykjavik. They budget 20 minutes to get out, grab a bus, and go. Then they land at 6:40 a.m. with 400 other passengers, wait 45 minutes at the rental counter, and realize the Blue Lagoon is 20 minutes away but every shuttle is booked until noon. This is not legal advice, obviously. But it is a set of hard-won, specific Keflavik Airport tips that will save you money, time, and the particular frustration of standing in an Icelandic parking lot wondering why you didn’t plan better. The…