I only buy kindle versions anymore. I print out the maps, and read the kindle as we follow the tour. Too much effort to flip back and forth between map and guide. I also read the "tour" the morning or night before, so the kindle guide is not necessarily new info, just in context as we see the landmarks.
You might ask how to print a page from a kindle book. On my iPad kindle app, open the map to full size, take a screen shot, then print as a photo on letter size paper.
This way I might only be traveling with 6-10 pages, instead of a book. I also have plastic protective covers with 3 holes for a 3 ring binder. I put the maps in the plastic cover, then I can stuff the map in a pocket, or backpack, and don't have to worry about rain, or ripping.