Hi We did the ride from Rotterdam to Koblenz and its a slog, certainly after zero sleep on the ferry, so your wise to cut it in half. Koblenz is nice if you havent been there before. Suggest the Altes Brauhaus near the church, great pub and spot on hearty food, theres also a brewery where you can eat its on the river a little drive out of town Koblenzer Brauerei-Ausschank. If youre into Military musuems, theres a cracker, its really old fashioned but got lots of stuff in it from all eras, its only about 2 euros, but take your passport for ID. Worth a walk there and a look round. (Wehrtechnische Studiensammlung Koblenz). Enjoy Alistair