That is the way I have crappie fished for years now. The wife and I use minnows with 6 -10' poles each with corks placed at different depths and setup just like spider rigging. When the one that is catching best is determined I set all the corks at the same depth. Usually this time of the year I can then stay in about the same depth of water with this setup and keep catch them. Sometimes we will have 3-4 poles with fish on at one time. Now when it gets hotter in the summer the fish are deeper and we don't use the corks and I have bought 10' reel and rods for that time of year when fish are deeper. But lately I have been trying different fishing techniques that others on this web site talk about. It is just hard to fix what ain't broke. So I keep fishing the same old way.