trying to explore this area so, is it actually possible to get onto the island at the far north? been trying for ages, theres a couple of places where it looks like you could get across but...
No there is not.
You are refering to the island with the huge tower/cliff formation and shrine on there i presume.
There are some shallow areas that looks like you could get across but you acctually can't. Just hug the shore and whateredges then you get some exploration of the island.