As of yesterday, you can now play Laketown on our Siege server. This map is in the cycle after Moria and before Erebor, and it lasts aproximately 30 minutes.
EpicQuestz has made a very useful tutorial for the new map, as long as class and flag info, so I advise you to check that out!
To make navigating the map easier, here is a top view render of the map with the flag locations marked. You can click this image for a bigger version.