Road trip planning apps/sites

[pizzaandtulips]

Anyone use a road trip planning app or website? We are taking a road trip this summer, about 18 hours I think. We will break it up into a few days. I would love to have something that helps us plan the route with suggestions of where to stop, things to see, etc. Would love to be able to plan it ahead of time and save the route and places we want to stop. Any recommendations?