I thought that too but I spent hours looking for him with and without friends. I also tt'd to see if I can find him or anything. Nothing. But he's just fine on my fiances game.If his boat is there, he should be there. He's wandering around somewhere!
Can't go on the boat and he doesn't wander around my island either sadly.Are you unable to enter his boat when it's there? He doesn't wander the island after his initial visit, he stays on his boat after that and you have to go to him.