I finished the Vampire quest line in Dawnguard. But I noticed that I was noticably carrying too much weight. I discovered the biggest factor is the three Elder Scrolls - at 20 pounds each. However, it's impossble to drop them, sell them, put them in a container, or transfer them to a follower, as they are marked as quest items. However, the best I can tell, I no longer have any quest that requires them (as the vampire quest line is complete). Even the College librarian won't buy the scrolls.
Am I really stuck carrying 60 pounds of useless weight for the rest of the game?
Thanks