stuartsx5, I haven't found a bad time of year yet. My favorite time is the fall (October), just because the boat traffic is less and the cats bunch up and feed consistantly. The earliest I have started jugging has been early March. We ended up with 12 in one day that time. I stay away from LOZ in the summer time, so I don't know what the fishing is like then.
We anchor ours with a 10-16oz weight, and have one hook 5' off the bottom and another 10' off the bottom. I try to find them on the fish finder and then drop the line right in the group. You can catch a ton of fish if you find them first. Jugging for cats was kind of an after thought, so we only used two jugs this weekend. If we go down targeting cats we will use 10-15 jugs. My buddy likes using shad, I like using small bluegil. Those 2.5-3" bluegil will catch more fish than the bigger ones. Our 4 cats were in the 5-10 lb range.