You can pretty much do that between Deep Roads locations. When you finish one area and can move to the next, you get a map of the Deep Roads. If you click on the world map, you can go to the camp. You can then go back to Orzammar, walk to the entrance of the Deep Roads, and click on the next location you would have proceeded to in the Deep Roads (i.e., you start at the new location instead of having to completely redo the part of the Deep Roads you already were in). It adds a little bit of time, but isn't that significant. I did that several times in the Deep Roads to sell equipment when I was getting close to filling my inventory.
