Having a quality trolling rod rack will greatly increase your success and decrease frustration as you are able to better manage fishing multiple rods at the same time.
While almost any rod will suffice, specialized trolling rods designed to push or pull heavy crankbaits or downrigger weights while maintaining sensitivity even at lengths of 20' is the realm of crappie trolling rods.
We will typically fish either a stagger of 10' 12' 14' 16' rods off the front of the boat, and straight 10' rods off the back. Having different rod lengths allows us to achieve a desired 2' rod tip to rod tip spacing essential for managing a multi-pole set-up to avoid crossing lines.
We fish both B'n'M Buck's Pro-Staff Trolling rods and B'n'M West Point Crappie Rods. The Pro-Staff rods are a little pricier but available in longer lengths and offer replace end sections for about $20. The West Point Crappie Rods are no-frills workhorses that if broken won't hurt your feelings when you go to replace.
Again, any reel capable of retrieving your offered bait with a fish up to five pounds being pulled from 20' of water 150' from the boat will do, but some reels are better suited than others. When we're pulling crankbaits, line counter reels take the guess work out of lure depth optimized for strike zone presentation. Through experience and available published resources, we know that certain baits run at certain depths based on either speed, amount of line out, or both. Having line counter reels allows us put our baits out either at an exact depth or range of depths to target or locate active fish.
Having a quality trolling motor with GPS/autopilot capabilities will free up your hands and attention to catching fish. Windy conditions often present on Mississippi Reservoirs mean you'll need something not just big enough to push your loaded boat 1 – 2 mph, it will have to be able to do it into at least a light wind.
I like the Minn-Kota Terrova or Minn-Kota Ultrex, both of which come with foot pedal control, an iPilot Remote, and spot-lock anchor/autopilot capabilities. These trolling motors are 24V motors, so you'll need two dedicated batteries to avoid potentially drawing down on your cranking battery.
Watching and fishing 8 rods in no easy task, and is often (and legally only) done with two anglers. In order to economize space and maintain angler comfort, all of the dedicated crappie boats in my fleet have Millennium SideKick Fishing Double Seats with Millennium Marine B-100 vented seats.
While certain lures perform better than others at various conditions and times of the year, minnows and small jigs are year-round effective crappie fishing tools.
If I'm slow trolling minnows, I'll use Eagle Claw Crappie Rigs size 2 or 4 with 1 to 3 oz casting sinkers at the bottom.
If I'm slow trolling jigs, I'll do a Carolina rigged 2 oz egg weight above a barell swivel, then tie Beetle Bou Marabou Crappie Jig in Chrome tinsel on a loop knot 6 inches below the swivel, and other jig using a clinch knot 18" down on the same line.
If I'm pushing or pulling crankbaits, its hard to go wrong with Bandit 300 deep diving crappie crankbaits. These lures are available in a variety of colors and are durable with extra sharp concave treble hooks.
The line you select is less important than how the line impacts strike sensitivity, load bearing, abrasion resistance, and memory.
Ultralight line allows you to cast lighter baits, but has low abrasion resistance and high memory. Braid offers acceptable strike detection, has high tensile strength and abrasion resistance, and low memory, but has such a small diameter its difficult to spool large trolling reels on braid alone. Depending on time of year, I will fish either 12lb mono or 20lb braid.
I like Ande Back Country Blue or Back Country Green Envy if I'm fishing 12lb mono and Spiderwire Stealth if I'm fishing braid.
Unless and even if you are very familiar with a lake, I like to have a purchased copy of the FishSmart by Humminbird Contour map for every lake I guide on. It allows me to pre and post fish at home by looking at objective areas or comparing what we saw on the water to what is published about what is below it. These are one time purchases and compatible with iPhones and Android phones.