We did our own thing in Stavanger, Geiranger and Bergen. The only
DCL excursion we did was the Path of the Trolls
Stavanger: walked around town, visited the Canning Museum (Hermetik Museum), the watchtower and the Oil Museum.
Alesund: Path of the Trolls is spectacular views, but a long day. Our guide was not very good, but the scenery was beautiful nevertheless. If you don't mind a full day, I would recommend it. Sit on the right hand side of the bus for better views. And bring your own lunch if you do the tour "with leisure time".
Geiranger: We went on our own hike from the port to the Fjordcenter, then to Westeras Farm, from there to Westeras Fjellet view point and then up to Storsetterfossen waterfall. Beautiful hike despite the slight rain. But one ought to have proper hiking shoes as there is a lot of steep up and then down hill.
Bergen: We had ordered the Bergen Card in advance and had it mailed to us. So, from the ship we took the public bus to "Gamle Bergen", a museum of old wooden houses from all around Bergen. It was really nice as the insides of the building were accessible as well. They even have some houses were there are people "living" in them. Back into town with the bus we walked around, visited the leprosy museum, the train station, the city center and in the afternoon took the funicular up to Mount Floyen where we went for a short walk to a lake.
Make sure to visit a bakery at some point to buy some sweet buns. Norwegian baked goods are delicious!