AAA also offers discounts on most motels, if you show them the card when you arrive. I think the AAA website also creates a travel map for you, if you give them the departure and arrival points.
The very best thing to do is to go to the AAA travel office and have them do the map right there.
They highlight the route and mark off possible stopping points, including the hotels of your choice. They even let you know if you'd end up saving more go with a better place since the AAA discount brings down the price.
It's nice to have!