Once you have the camp and the bridge locked down you can kill the Commanders and Refugee fairly quickly, they are on a 7 minute timer (roughly). Got 2 Rusty Spiked Shoulderpads in about 1 hour... These are great for giving to charmed pets to lower their magic resist's so you have less Charm breaks...
Best way to get here is to enter Blackburrow and fall through the tree on the left, you'll land in water and this is where the bridge camp is (Just clear placeholders (Shaman, Elite Gnoll's), the main camp is same area but further in by the spikes on the floor...