Your objective is to tell a story via a collage of all the elements of the trip. Shoot all kinds of activities in all kinds of ways. Instead of the traditional fish in the hand or on a rock, try a close-up of a fish s head coming over the gunwale, or shoot down into the net. Whenever shooting the fight and the netting of fish, make sure that you get water splashing or dripping. It gives your pictures more immediacy.
Film is relatively inexpensive compared to the cost of most any trip.
Taking more shots from different angles and perspectives will ensure that at least one will capture the essence of being there. Watch professional photographers at work. They take a tons of pictures to improve their odds of capturing that one special picture. There is no need display your bad pictures. I would suggest though that you keep a separate scrapbook of these rejects.