Sinceall i do is night fish the 3 mile i think i can help.
First go buy yourself 2 bags of 4"Natural or Moulting Gulp. And 2 bags of the 3" Natural or Moulting Gulp. Then buy some 2/0 Lazer sharp circle hooks. More the better. Also pick up a 50 pack of 5/0 Lazer sharp circle hooks. Make sure they are the red ones. Since red is the first color to disapear after 15ft. Buy a spool of 25lb Andes Mono line. (Used for your leader) and a bag of 1-2 oz slip weights. The size of the slips depend on your preference and current speed. Also get yourself some decent size swivels.
So once you have all this....Drive to the south side of the middle of the bridge. Where there is still structure from the past fishing bridge. Anchor out to where you are sitting in line with all the remainding bridge parts.
(This rig is for the trout that you will use for bait. I recomend you have a rod just for this purpose of catching trout.)Take your line, slip a weight on. Tie a swivel. Make a leader from the Andes of about 8-10". Tie this to the swivel. Tie one of the 2/0 hooks on. Run the hook through from top to bottom the gulp.Drop to bootom and reel up slow, stopping for 45 second intervals. you WILL catch a trout if they are there.
(This rig is foryourreds. After catching a trout of about 10-12" long. Dont worry, there is no size restrictions on the trout so put that sucker on there guilt free.)Take your line, slip a weight on. Tie a swivel. Make a leader from the Andes of about 8-10". Tie this to the swivel. Tie one of the 5/0 hooks on. Ok this is very important. Trout have a tough spot under their tounges, in the shape of a V. Go from inside the mouth through the V and out the bottom. This will hold the fish without it swimming off. Drop the trout about 8-15 ft down. I like to use rod holders because some times it can take up to 15-20 min before the red hits. But when they do....have that drag set so it cannot run into the bridge and snap you off.
I hope this helps and i wasnt over informative. Good luck and yes, the fish are out there at night and it is, in my opinion, the best time to fish. Tight lines!