I am in the very early stages of planning a road trip early next summer from Southwest Michigan all the way to Seattle and back. I am traveling with a friend and we are budgeting around 2 to 2 1/2 weeks for the trip. We are planning on making a loop in order to see as much as we possibly can. We are both very interested in seeing as many of the "big" sights, such as the badlands, mount rushmore, yellowstone, as we can and also any little, neat attractions such as the corn palace, etc. We are interested in both large cities and small, in order to really discover how wonderful the rest of America truly is! Once we are in Seattle we are planning on spending at least a couple of days there, and are also planning on making the trip around the Olympic National Park.
So what we are asking is any advice on what to see, what isn't worth the time, any scenic routes, etc. Also, would 2 weeks even be enough time? We are road trip newbies and would appreciate any and all information!