In this fanfic situation, Naruto might run into some shipwrecked sailors. They could share their knowledge of the sea and navigation with Naruto, which could be useful in his attempt to get off the island. Or he could meet some strange creatures that have the ability to communicate and form an unlikely alliance with them to survive on the island.
Perhaps Naruto will encounter some ancient spirits or deities that are native to the island. These entities could have their own agendas and might either help or hinder Naruto depending on how he interacts with them. Another possibility is that he meets some hermits who have been living on the island for a long time and have unique skills or knowledge that Naruto can learn from.
He could meet a lost shinobi from a different village. This shinobi might have been stranded there for a long time and has some valuable knowledge or skills that Naruto could learn from.
He might meet the leader of Amegakure. Naruto could also come across some skilled shinobi who are masters of rain - based jutsu.
In the 'Naruto goes to the North' fanfic, he may come across a group of nomadic ninjas. These ninjas have a different way of life compared to the ones in Konoha. They might be more in tune with nature and have unique abilities related to the natural elements of the North. Naruto could learn a great deal from them and they could also be potential allies in his adventures in the North.
He might have to figure out how to survive on his own. Maybe he'll start by looking for fresh water sources like springs or collect rainwater. He could also try to find food such as fishing in the island's waters or hunting small animals if there are any.
Naruto could meet the Raikage in this fanfic. The Raikage, being the leader of Kumo, would surely take notice of Naruto's arrival. They might start off on a tense note, as Naruto is from a different village, but later develop an understanding.
Naruto might meet his future children. He would be able to see what kind of people they are and what their dreams and aspirations are. It would be an emotional moment for him, seeing his family in the future.
He would most likely meet his father, Minato Namikaze, and his mother, Kushina Uzumaki. These are the two main family members he never really got to know growing up.
There's a chance Naruto meets some of Tenten's regular customers. These could be other ninja from the village who are also looking for supplies. Naruto might interact with them, sharing stories about his recent adventures while they browse through the items in the shop.
Naruto could meet some young and upcoming Iwa ninja trainees. They might be curious about Naruto and his abilities from Konoha. These trainees could either look up to Naruto or be jealous of his fame, leading to various interactions. Also, there could be some old - timer Iwa ninjas who remember past events involving Konoha and have their own views on Naruto's presence in Iwa.
There's a possibility that Naruto meets some of the younger generation of shinobi in Suna. These new characters could be eager to learn from Naruto or challenge him to a friendly spar. He may also come across some of the elders in Suna who have their own stories and wisdom to share with Naruto.