You didn't mention transportation. Car, bike, or urban transit (rail/bus/cab/bicycle/feet)? You can get a 30 day EuroPass for the rail in Europe. Goes everywhere. Certain travel rules apply. At all stops there will be buses, cabs, bicycle rentals, car rentals, etc. Rather than haul all your stuff around, try and find one of the few hotels or hostels that will allow free or low cost storage of your luggage, while you take trips around to other places for a few days. You'll have to do some research to find where those type places are. There are a lot of resources on line, but it will be overwhelming amounts of info till you get a handle on what you really want to do while there. BTW, the only tours that I would recommend, are not bus tours, but boat tours down rivers. Very cool.