Next summer we are hoping to do a Rhine 'road trip' starting from Rotterdam and following the river as far down as we can. There seems to be a lot of things to do and see, any advice on picking out the gems would be gratefully received. We like vineyard country, also cars and motorcycles, history and archeology. Also picturesque towns and interesting architecture. We have never been to Germany before. We would ideally like a week in hotels and then a cottage as a base for the second week. Anytime July, August, September would suit. Thanks in advance.