I always used a 10' seine. Just attach poles on both ends. Ideally it takes 2 people; one on each pole dragging the seine through the water. We drug creeks, ditches, and ponds. On many drags we'd sometimes get 100+ crawfish and various small bait fish. Doing it by yourself works also. On narrow ditches just take a pole in each hand and drag it behind you. You can also stick 1 pole in the bottom and swing the seine around in a circle heading back in to the pole you stuck in the bottom. Plan on getting wet unless you're wearing waders. It doesn't take long for crawfish to appear in holes or puddles created by standing water after a rain especially in areas that are subject to standing water after a rain. I've caught a lot of crawfish in holes that were bone dry one day and standing in water 2 days later after a rain.