Leader length can vary. Kraft and Rengo discovered that 7 foot snells avoided snags and still caught fish. That was the same length as their rods. Sometimes, though, shorter snells are better. If you do use longer snells, use longer rods otherwise, landing fish can be a trick.
Fish virtually hook themselves on spinner rigs.
Give the fish some rod tip, keep a bend in the rod and start reeling slowly. Ten pound Stren MagnaThin is a great monofilament line for use with spinner rigs. Locate fish by moving from structure to structure while looking for telltale marks on your sonar which indicate gamefish and baitfish. Try different depths. But, during the tournament, they found more active fish on deeper gravel, a perfect set-up for bottom bouncers.