The anti-dragon shields around the harbour and High Hall can not be removed. You will have to transform to human and run the rest of the way there. You can fly over part of the anti-dragon shields around the harbour and slayer camp, and transform above to drop down.
On the path between the depleted ore mine and the harbour / High Hall you can meet a traveling merchant (only once). You will need at least 52k worth of diamonds, malachite ore and loot to sell if you want to get the malachite gem he has for sale and the 50k of gold he has; another 20 or 30k worth of stuff would help if he has any other items you wish to buy.
