I've had a reoccurring dream, mostly in plot, when I'm really stressed. For me, traveling makes me happy (usually) and so when life is to that breaking point stage, my brain tries to make me feel better, the problem is I eventually realize I'm dreaming and all of the dream logic doesn't work anymore.
They have to do with packing. I enjoy packing for trips and in the dreams I'm going through airport security, or at a stop for a stop over and realize that I don't remember packing for the trip. Another is that I forgot to pack and we need to leave in like 10 minutes.
The worst is being almost to the destination (in my dream) and realizing I forgot my medication. It's horrible because that happened to me when we went camping once.
So, you can BET I make gather items over time and put in the cruise pile/box and make a list while packing.