Welcome to the guild, Margaret! We make mostly fantasy maps here (a few real life ones but they are the exception) and only a tiny number of us use GIS software. I do love what you're doing in making maps available to all with great scanning techniques. It would be nice to see some examples of what your scanners can do though (I couldn't find any on the website, perhaps I missed them).
Have you seen Cartotalk? You might find a lot more interest there as they are 'real world' mappers.