Hi - we're a couple in our mid 40s and this year we're planning our very first holiday without the kids (their choice, not ours). The plan is to travel from Chicago to Seattle away from the Interstates and see a bit of back road America. We'll allow three weeks and definitely want to visit the Badlands park - and preferably one or two others as well. Another objective is to see something of Montana - but we're open to advice. Could anyone offer any recommendations / possible itineraries? The main reason we've chosen these start/finish points is that they seem convenient for flights from/to the UK so we're flexible if you know better ... but we do want to end up on the Pacific coast! Finally, we're budgeting around 200 dollars a day between the two of us (not including car hire) - is this reasonable?