I realize after typing my response and re-reading the OP I am off topic. My apologies but I feel the response represents many on the forum.

I'll just relate traveling in CONUS. I occasionally fly to work retreats with several employees. Fly to Vegas with friends. Drive around the West Coast for races and long weekends.

I am known by what we all recognize by the term, "Boy Scout" in my group. Someone needs something, regardless of how arcane, I have it or something that works. This is not compatible with ultralight travel. I always carry more gear than anyone else.

Extra this and that. Batteries, flashlights, Steripen, SPOT2, blades (or bang bang), sewing kit. Of course if I am driving there is a large pack and/or 5 gallon bucket full of tent, fire and stove, sleeping bag gear, cold weather gear, cases of water, food, rope, etc. Almost a minimalist camping trip.

I buy maps everywhere I go. First thing.