We'll be in Germany in a few weeks and are making our final preparations. Our final lodging will be in Rudeshem where we plan to take a KD Rhine River Cruise to St. Goar. I'm curious to know if anyone knows the difference between a "Panorama" and a "Regular" cruise? The schedule for the "regular" cruise looks like it takes a lot longer but I can't find information on whether it offers more things to see along the way. Also, is it a good idea to pre-book the cruise or is there usually plenty of room?
I'd also appreciate learning of others' experience walking from where the KD ship docks up to Rheinfels Castle. Google is showing a 30-minute walk but it looks like it may be steep. Is it a steep hike up or can it be done as a leisurely walk by people in decent shape?