What's going on, Dsiemssen? Cats in a small lake on spinning tackle, huh? OK.
1. 8-12 lb. test clear mono for your main line. 4 lb. test for the weight dropper line on the Wolf River Rig. 12-20 lb. test for hook leaders.
2. 1/4 to 1 oz. Small lake = no current, so 1 oz. is plenty for bottom fishing (1/2 oz. or somewhere in between is better), & the 1/4 oz. should be more than enough for any float fishing. The lightest weight you can get away with is usually the one you want to use. As far as type of weight: bell sinkers (or what Water Gremlin calls "Bass casting" sinkers) for the Wolf River Rig, barrel weights or bullet heads for the Carolina Rig, rubber core or splitshot for the float rig.
3. Kahle or aberdeen in sizes from 1 to 2/0. Some guys are starting to use circle hooks for cats now. I never have, but found these two styles... in this order... to be the best. Thinking of trying the circles this season. I'll let you know how they work.
4. Nightcrawlers. Cats love them, & so does just about anything else that swims in fresh water. So, if the cats aren't biting, you'll likely pull up something else to occupy your time (maybe a nice, pan-sized walleye... I can always dream). Just watch out for the bait stealers.
5. I'd probably go with a bobber when over the rocks, on the bottom everywhere else.
6. Stillfishing. Catfish usually only chase baits just before they spawn.
7. Wolf River or Carolina Rig for bottom fishing, or float/weight/hook for bobber fishing. Keep the weight near the hook when float fishing, to keep the bait near the bottom.
Hope I helped a little. Let us know how you do.
Keep the line fresh, the hooks sharp, and have fun fishing. God bless you. -Sonny, Life Member since 2002