RPS has helped me a lot with his shared info'.
I haven't seen it posted in this topic or maybe I have over looked it ; I would add this to the bottom bouncing technique, unless you are fishing on a flat where the depth is fairly constant, it would be a good idea to hold the rod at all times, regularly dipping to check your relationship to the bottom. Also this will allow you to follow the bottom as you cross points and other structure.
Say the top of the point is 14 ' but 50 ' on either side. By holding the rod and crossing the point you can let line out to say 35' deep, then slowly reel in as you cross the point ticking the bottom regularly, then follow it off the other side and down to what ever depth you feel is right for your set up. In this way you will be able to reach fish that may be staged up along the face or edge of a transition.
I have not had much luck putting my poll in a rod holder and driving, unless I am after suspended fish in deeper water, or on a very regular bottom.
I am sure you will find all this out soon, trolling works good for spring crappie too. Wait for the sun to come up and just troll down the middle of a cove. That is when I use the poll holder.