The title of your post says "fishing kits" but the list of items appears to be for a PSK.

If I were to add one thing it would be a PLB and I would also hope that the boat is equipped with a marine band radio that someone is experienced with especially considering the spottiness of the cell phone reception.

Also the boat has appropriately sized life jackets for all and there is a set of oars in case of engine failure?
_________________________
Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock