I left sundalassar to do a acouple leftover errands and now I cant get back in to the city. It says destination unreachable from the map. Is there any way to do this besides reloading a game?

Go to the Forest of Tethir. The entrance to Sul... des... er... The entrance to that elven city is actually somewhere on that map. Remember how when you gave the Lanthorn to... er... argh, that guy, he teleported you to the place with the door in the tree? That was actually the Forest of Tethir.