Google maps has evolved slowly to let you plan your trips and save the results. In the past I have used DeLorme, Streets & Trips, and the Trailer Life planning software. All three of the above are gone and you can only get old copies. We are in the middle of a long trip and I used Google Maps for the first time as my main planner. It has worked well so far. Of course you have to have a fairly reliable internet source to use it during your trip. And nice if it works on your smart phone.
Surprised to hear of your Windows 10 problem. Before we left on this trip I added Windows 10 to two older laptops and so far it has worked very well. Much better than I expected.