I know this site is mainly for cartographers of fantasy worlds and islands, and my question is focused on real maps and geography, still there are so many experts here on cartography and mapmaking, it can't hurt to ask my simple question here. And in advance, please excuse my ignorance.
I'm in the middle of writing a thesis on the most authentic Exodus route (following the clues given in the bible). I would like to demonstrate on a map the sites and locations where the Israelites stayed (during the forty year wandering) as well as the route they took to get to Canaan. I tried creating one with Google maps but the problem with maps is that it gives me an exact route which is unsuitable for my needs, given that these ancient routes are at best uncertain, and I feel that giving an exact route is misleading to readers. Furthermore, most of the highways that Google follows most probably did not exist 3000 years ago! Sometimes it will give me an unnecessary long and complicated route from point A to B because no direct roads exist nowadays between the two. I was looking for software that would give me the ability to create an approximate route, e.g., arrows to show where they went maybe also add text and dotted lines to indicate a route, but should be ultimately grounded in reality and real topography. I attached an image to demonstrate the kind of route I envision. Can anyone suggest a software program that's suitable for my needs?
Click image for larger version.  Name: Exodus Route Map.jpg  Views: 43  Size: 2.31 MB  ID: 125457