Wool batting is fabulous for handquilting!
Use batting and fabric for packing material; great for filling in corners in boxes or laying on the bottoms or tops of boxes. Thread spools can be wrapped in small fabrics - folded fat quarters - and placed in drinking glasses before they are packed. There lots of ways to get your supplies to where you need to be without making extra weight, or boxes, or effort.
Best of luck to you on this Alaskan adventure; I admire you, but honestly can't say that I envy you!
Jan in VA