If you could use some pointers on creating prop maps I heartily recommend a visit to the Cartographer's Guild. Inside you'll find a thriving community of mapmakers crafting fantasy maps of every kind, from recreations of ancient world maps to detailed deckplans for starships. What I find particularly nice about the forum is that it has material and tutorials for folks using free and open source programs like Gimp and Inkscape in addition to the higher end ($$$) mapmaking and graphics program.
This sample map from the tutorial on creating antique-style maps gives you an idea of the level of quality you'll find. The detailed instructions make it easy for anyone to create fantastic maps without having to spend a big chunk of change.