[Rune Son of Bjarne]

I don't think the answer is as simple as you all make it out to be. . .

Scenario1: Sauron keep Dol Guldur as his main base . . .This will most likely mean that Mordor will be easier to get to, still quite a task though. Now we don't know how strong Dol Guldur actually was, but it seems certain that it could not hold the ammount of troops as Mordor and Sauron would not be able to get re-inforcments un-noticed. So it is likely that the North would actually be prepared for a fight and I am not at all sertain that Lothlorien would fall. Sauron would also have to fight the Elves of Mirkwood! It could very well be that the main difference would be that traveling down the Anduin would be a very dangouress action.

Scenario2: Dol Guldur is kept as a fortress, but Mordor is the main base of Sauron. . . . .well, yeah then the fellowship would probably fail.