I printed the map using a poster/plotter printer in two sections that I split up in photo shop, scaling the map size and resolution to fit a 1in player grid (the grid marks are there, but faint).
I then taped 12 2ft×2.5ft foamcore boards together and glued down the map, using gluesticks for the majority and hot glue to keep the edges down. I taped it so that it is a trifold, condensing down to a single 7ft×21in panel for storage and transport.
Someone else here in the comments suggested cottons balls for fog of war, so I am gonna get those and some poster tack to keep it all vertical. I am gonna track their progress by making player tokens and using poster tack to keep them on the board.