I have found the only way to "save" a route from Google is to put in your start and end points, your stops and points of interest, then PRINT the whole thing out with the step by step route.
If you know your approximate nightly destination points while enroute, then you can always do a route from point A to point B, print. Then point B to point C, print. Point C to point D, print. And doing this way, you have your own route and you don't have to depend upon technology when on the road.
Meanwhile, as suggested above, check each state Dept of Transportation for construction and road closings, modify your routes before printing.
I use my Tom Tom this way. I plan the route out Google Maps, but then put each destination point in my Tom Tom. Then drive from point A to point B. Next day you are at point B, punch in point C and drive happy! With the paper printe out it's a win. We also travel with our Iphones for back up. I phone (Google maps) are great for finding things in town or a local "something" we're trying to find when we are somewhere we've never been to before.
Between all of these conveniences, we also still carry a paper map (atlas) of the USA. Still, nothing beats looking at the entire picture in one frame!
