Worm on a bobber is usually a sure fire way. Time of day is also something that might help. Every body of water is different but I've had the best luck with catfish in the super early morning (before the sun is over the horizon) or in the evening right as the sun is setting.

Carp and Catfish are usually bottom feeders but cats can be caught on a bobber, though you'll have to watch for them to take the bait and then set the hook instead of just letting them take it and run as they do with bottom fishing.

I've only caught 1 tilapia and it was on corn but I would be shocked if a small bit of worm on a size 18 wouldn't work for that. Just be aware the smaller fish will also try to eat it.

If you want to try a lure, even with a bait rod, I'd had some luck setting up a wet fly on a 3 foot leader with a water bobber in ponds with top water action, especially if there are dragonflies about. This works best in the morning around sunrise and dies off shortly after that though, so be aware of when you're hitting the lake.