Regarding the goblin camp, there definitely needs to be more of a reason to go there. I didn't play a Githyanki but I tried doing an evil playthrough focused on just going for the most likely solution to the tadpole, which is the Githyanki. So I have no in-character reason to go to the goblins.
There are evil quest options in the goblin camp. Plus there's loads of hooks to get you to investigate the place (You're a True Soul of the Absolute, don't ya know).
