I've taken many of the maps and other locations (including the Coaltongue) and had the blown up and printed out by photobox.co.uk on their largest poster sized printouts. Sure I could draw them out on the battlemap, but the glorious full colour maps look great and get awesome player reactions. I did the same with the overall world and flint maps which get used all the time.
I've then augmented this with additional cardboard terraine. I have loads of cardboard, full colour, stuff from battlesystems (from multiple kickstarters that I have done) and I use that. Lots of battlesystems futuristic gantries make excellent industrial style upper walkways - for the spooky warehouse they were awesome. Where the scales don't quite match up, I just use the local terrain you are on and gloss over the difference with a "the 5ft is relative to the terraine you are in"
The more stuff around there is for players to use or interact with, or hide behind the better the gaming session is.
I mess with the scaling a little in photobox so that the squares on the maps end up at a real world 1 inch or slightly larger by counting numbers of squares and comparing that agains the printout size. At 45" by 30" stuff looks just great. Photobox complains about the low resolution of the images, but just ignore that message, for gaming it's awesome.
I arrange to do a bunch at once to get discounts, etc, works out at £10-15 per map. Most maps can be reused a couple of times. The train was awesome, did that, cut out all the carriages had them end to end, I've had several other rail encounters