You could go to Juiciest Island in the previous version and you can't anymore if I understood correctly ? Have you ever met Sam and taken the zepplin with him?
To unlock Juiciest Island:
You must first unlock Sam's zeppelin. To do this: you must have visited the police station at least once, started Liam and Emma's storyline (goal: the burglar), confessed to Gloria at least 5 times and wait for day 16 or more. The zep will pop up in the village. Talk to Sam, ask him to take you to the other side of the island, he quickly agrees