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Have you got water? Food? Will you be hiking to your fishing spots- will you need snacks? How are you going to light a fire (if allowed) and how are you going to see at night?
And where is your sleeping bag?
Honestly it just seems like you're taking clothes with you, I would take two pairs of long, breathable pants as you don't want creepy crawlies getting up your legs. Long sleeves are always a good option too, but I live in Australia so it's recommended that you always wear long sleeved shirts while in the sun.
Grab a box of matches and a lighter as well. You never know when they may come in handy, and you will need something to light campfires with. Also, one is none and two is one, so remember that when buying these sorts of things. A torch will also be handy for moving around at night. Assuming you won't be carrying 3 days worth of water on you, you should probably invest in some iodine tablets or water purification lest you want to end up with an illness.
Also are you going to be eating the fish you catch? One of you will need cooking equipment and you should have some eating utensils. Too accompany said fish you should probably take along some snacks like beef jerky and trail mix and some dehydrated rice which is always good for the carbs.
Take extra socks as well. There is nothing worse than walking around in wet socks and boots all the way back to camp, and your feet will thank you for it.
