I know you have to become a werewolf to continue the companions questline, but do you have to remain a werewolf to finish it.
Example: Should I do the whole companion questline as a werewolf before starting Dawnguard? Or can I just get to the point of joining the circle and becoming one then start the Vampire questline and finish the companions as a vamp?
I know you can switch back and foward. But, I just want to become a werewolf once before turning into a vampire for the rest of my game.