Comments of chapter undefined of Game of Thrones: Lord of the Seven Seas

Question. Given that the first treasure was in lonely light (the most isolated island) while the other was in old wyk (the most sacred island)....am I right in assuming that the 3rd treasure will be in saltcliff/saltfinger (not sure what exactlly was the name of the island)?? Cus if we go by logic harlaw, great wyk and Pike are too populated and under attention for there to be hidden treasures. While blacktyde and okfort are already eliminated. So realistically the only place left that is suitable to hide treasure on is the saltcliff, right?