Couple of weeks ago, 4 of us (3 adults, one child, age 8) went on a weekend 1500 mile round trip up north. I have made many of these trips to the same place however I still keep a checklist.

We didn't forget or run out of anything...but used more water (15 Lt total) then I thoght we would. The bonus items carried (as always) were baby wipes (no babies with us) and disinfecting wipes for those roadside rest areas with questionable sanitary practices in the washrooms.
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock