I highly recommend starting with no shorter than a 12 ft rod for trolling! Got to get it away from the boat (shadowing) and TM (noise/movement). I use both BnM and WM trolling rods and I literally fish the heck out of them....they are fished hard 2-3 days a week but I do take care of them. I have never experienced any problems with the rods.....but, I have worn out more than a few spinning reels by WM, Diawa, Shimano, ect. I threw away a couple of WM spinning reels just a few days ago because the bail quit working and they just weren't worth getting repaired.
From the ARK-LA-MISS Delta....... Crappie Paradise ! ! ! !