[Caspian]

Ok, I've read the wiki about 10 times. Maybe its worded poorly, maybe I'm just dumb, but its really not making sense to me and I've been told three or four different things by different people.
Wiki basically says to check the Gates, then find the ??? on one of the hills and it gives you the plate. It then says that every time you enter or leave Zhayolm, that you have to recheck the Gates.
I was then told by a party member that you have to check the gate, then find the ??? and thats it.
Then, an ls member told me just find the ??? and that's all you have to do.
Has anyone done this that can recall what's all involved? Especially clarifying the wiki part about checking the gate everytime you zone in and out of Zhayolm.