Not really. You see, this land is full with villages which will join the kingdom of Dale happily (they used to be part of Dale but left when Dale got burned by smaug)
Sorry to tell you fam, but im actually the biggest expert Around here if its About the Orcs of Gundabad. The Orcs of gundabad actually can build insanely Well compared to other Orcs, they Also are unmatched in making torture devices and siege weapons. The Orcs have Gundabad have numerous insanely Large caves through the mountains to angmar. These 2 lands were combined by the witch king of angmar and this numerous Paths are made. The Orcs of Gundabad can march to angmar and be there within 5 days if they march with certain rest times. Unmatched through the mountains and over the mountains they can easily march to angmar. Not to mention the caves through Mount gram.