I love your comment: "It often crosses my mind how much I would have LOVED playing with my girls when I was 9 or 10." what a good way of measuring your parenting efforts. : )

We laughed recently as a family reading a list of 3 items  someone wanted to bring to a deserted island - a power adapter was one. On a deserted island, where is power to be had? Better to have a sensible survival pack like your daughter's.

As for what to bring, follow Douglas Adams' advice - don't forget your towel:

"A towel, it says, is about the most massively useful thing an interstellar hitchhiker can have. Partly it has great practical value. You can wrap it around you for warmth as you bound across the cold moons of Jaglan Beta; you can lie on it on the brilliant marble-sanded beaches of Santraginus V, inhaling the heady sea vapors; you can sleep under it beneath the stars which shine so redly on the desert world of Kakrafoon; use it to sail a miniraft down the slow heavy River Moth; wet it for use in hand-to-hand-combat; wrap it round your head to ward off noxious fumes or avoid the gaze of the Ravenous Bugblatter Beast of Traal (such a mind-boggingly stupid animal, it assumes that if you can't see it, it can't see you); you can wave your towel in emergencies as a distress signal, and of course dry yourself off with it if it still seems to be clean enough.â€
  	
— Douglas Adams, The Hitchhiker's Guide to the Galaxy
http://en.wikipedia.org/wiki/Towel_Day