A Jug of Wine, a Loaf of Bread -- and Thou
Beside me singing in the Wilderness --
Oh, Wilderness were Paradise enow!"
-- The Rubáiyát, Omar Khayyam
And you never can tell when the portability and convenience of a pochade box will make a sublime experience possible. For example, our first evening in Le Pre, Normandy we popped out to the nearest grocery store (in Saint James) for some provisions... and we greeted by the scene depicted in Sunset, Normandy when we exited the store. (Our kids were kind enough to put the groceries in the trunk while I took my portable sketch box out, and dinner was only a little later than expected.)
French easel for stability on windy days
...or in your car (where the solar effect can make it shirtsleeves-comfy, even on a nippy autumn day)...
of light weight carry-on luggage weighing less than 2 pounds
(this one with 3 convenient painting edges)
(i.e., fingernail polish) to seal the wood(I also sharpen and clearcoat one of the leftover handles
as a "signature stick" -- for fine lines and inscribing through multiple layers of paint)