Of course, all the necessary fishing equipment is needed. As for what else would be required, it would depend on when the fishing occurs. If it is during a camping trip, then all necessary supplies such as food and water, have already been packed. Same with a picnic or hiking trip.
However, if it is specifically a fishing trip, then other essentials such as bottled water, and food will be needed. Bring along a waterproof bag such as a backpack to take carry other essentials, which might include sunscreen with quality SPF protection, sunglasses with UV protection, a cell phone, wallet, and a map. Insect repellant is another essential to as is a first aid kit in case of cut or scrapes.