Printing out table top maps

I have the PDF of the “I Smell a Rat” adventure, and I am thinking about starting to GM a GURPS game. Are there any recommendations on printing out the maps? I cannot find “I Smell a Rat” maps on the official store. My local library can print things out very cheaply, but it only has 8x11 paper. So, should I go to OfficeMax and print out the maps as posters, or is it my best bet to tape them together from the local library? Is there a place online you would recommend? What are all your thoughts about this?