Spider trolling isn't trolling at all. It is pushing jigs. It is where you see the guy sitting on the front of his boat with multiple poles out dropping line straight down. Long line trolling is trolling like you normally think of trolling but with a ton of rods in at once. Both have their advantages during certain times but a lot is just what eac person is used to. Jig size all depands on the conditions and watertemperature. If I went this weekend I would be trolling 1/16 oz jigs. As the water warms and they mve farther up the creeks and towards a shallow staging area I will move to 1/24 oz. When they move real shallow I switch to 1/32 oz. I cast each pole out as far as I can on a normal cast. I don't break my back doing it, just a normal cast length will do. There is nothing more fun then trolling and having four poles bend at once. One in each arm. Stepping on another and one you have under your butt just to catch some good eatting crappie. The big thing to remember is that you need lots of jigs. I use the JR Jigs out of JR Marina at Weiss Lake. I usually stock on about $50 dollars worth per year. If you aren't breaking line you arent where the fish are.