If you are going to fish in the river, make sure you wear your heelies. You need those wheels to keep up with those big fish once they grab that worm.
Rent a double wide stroller and take it out of the parks - you can put the caught fish in there. The stroller also serves to move people away from the railing at the river if they are standing in a prime fishing area. A good blow to the back of the knees will move them everytime.
Make sure you pack your Foreman grill so you can have a fish fry when you get back to the room. As there are few balconies in Universal, you will have to disable the smoke alarm in the bathroom. If the grill is too cumbersome to pack, I also read on a thread sometime ago on the CB about a method of just bringing some sort of rack and putting charcoal directly in the bathtub to barbecue. The person who did this was at Disney, but it should work at Universal as well.
Other requirements for fishing at Universal: be drinking beer out of 6 year old Disney refillable mugs, smoke, have at least 122 visible tattoos and dress like a thug.