If you have a second rod of any type, preferably heavier, you can add a sliding sinker-swivel and a couple of beads before the swivel. Add a bungee and 4-5' of 14-16# leader and then your dodger/flasher ahead of your spinner/hoochie. Don't forget to have the leader ahead of the dodger/flashers because if not, it will dampen (read kill) the action of your attractor.
In time you will have plenty of dedicated rods but I fish by myself most of the time during the week and have a minimum of 2 downrigger rods, 1 lead core and 2 long-line/diver/weight rods ready to go. I don't always take my leadcore rod but that is probably a mistake.
Figure out where 100' of line is and add a bobber stop at the reel so you always have a starting point. Early morning go with 1/4 - 1/2 oz and add more weight as needed but do not vary the line you let out. Keep a diary of the water temp, depth, lures, weight, etc. once you find a set-up that works with your DR use the same on your weighted line and adjust the weights until you hit the sweet spot.
You can try playing with your sonar's sensitivity until you find the thermocline but if you spotting most of the fish at 21' in 100' of water, bingo!
It's not like we have a lot of other things to do while putting around at 1.2-1.7 MPH......