"Smugglers Cache(s) (Levels 13 and 16)" "Smugglers Cache(s) (Level 16)"

oh hell.. Am I wrong or this parts missing two caches on the west from Arinbjorn and south-west from Kaer Trolde Harbor (or south-east from Lighthouse)? Maybe it's better if you start a more to south for the both side of the Lighthouse and travel zig-zag to the north..

"the first of which is east and slightly north of the relevant signpost."

it's easier to fast-travel (or should I say "boat-travel") to the Kear Trolde Harbor and sail to the west and slightly south from here.

"You’ll find a third Smuggler’s Cache west and slightly south of the jetty along the southern end of the island upon which the Eldberg Lighthouse is"

Maybe I'm wrong, bug southern end of the Eldberg Lighthouse's island is in the north at the moment, and it can't be west and south..