When I'm lucky enough to travel to distant places, I usually use my camera to record images. Unfortunately I have got out of the sketchbook habit of recording directly, although I do record ideas and develop compositions into several small books.
In Greece recently on the island of Halki, I thought I'd try a different approach. I took paints (acrylic and watercolour) and some very small offcuts of board, about 15x10cm. The rest is pretty simple, find somewhere out of the sun (or work early)and find something interesting to paint!
I finished this doorway with thistles after I got back.