Well - we travel* instead* of doing gifts so that helps. I ask the children ahead of time do you want a trip or stuff. They were OK with backpacking across Spain instead of presents.
However, I am giving them each something nice - but it is still "an experience" and not stuff. I will make a nice card that says "You are getting to go to a college basket ball game" and "You are getting to go on a 2 hour horse back ride" - both things that I have scheduled in January when we are back.
I am going to do stockings in Spain, with pokemon cards, lottery tickets, chocolate etc. - I am not sure how to actually do stockings - ours are fancy Pottery barn ones, too big and fluffy to take on a backpacking trip so we might have to figure out that part.