I dont think my viewingdale would be a good fit in this case since it takes a fair bit of time to learn how to do the mapping with the app. I think you need something quite simple that people can get onto the controls of and get some maps out quite quick. Mapping something which exists accurately is quite a refined art and all of the apps to do that are quite complex. If your looking for something which creates a random map then it can be much easier. Im not sure what app to use but I think something hooked up to a pen tablet with some vector lines and flood fill is probably the basic components that you need. Maybe Paint.NET or something like that perhaps.