Ok, let's see if we can't get you on a pattern.
Antioch Lake
Green = Shallow water for spring/early summer and during the spawn. Fish inside the weedline that appears on the map. In and around docks is a perfect place for spawning females to take cover.
Yellow = Summer temps starting to rise. From the map, fishing through and outside of the weedline would be my choice. Creature baits, spinnerbaits and crankbaits. Cover all of the water column until you find the bite.
Red = Mid to late summer. Baitfish, crayfish and other small creatures want to stay cool too. The bass will follow the food. Like you said, this might be where a sonar unit will help pick up structure and other areas of interest. Dropshot, dropshot, dropshot.
Dropshot Tips
Grab a 4.5" to a 6" Roboworm and rig it on a #1 dropshot hook. Tie on a 1/4oz weight for anything up to 20 feet of water (deeper depths call for a heavier weight). Cast it, let it drop and let it sit. Shake your rod tip slightly, moving it only an inch or two at most. Give it a rest, then slowly pull it back to the boat. Keep the weight in contact with the bottom at all times if possible.
Points
Do fish hold on points? Often, yes. But I catch just as much fish on areas of the lake that don't appear "special" in any way. There are 5 main points on Antioch that I would focus on, but if you are fishing for a couple hours without much action, you're on the wrong pattern for THAT moment. Hit those points. You could try topwater, move to a medium diving crank, slow roll a spinnerbait, and finally move on to your soft plastics and jigs. Don't fish one technique and then move on. Cover all the water that you can to try and find a bite.
Trophy Lake
Same color descriptions as above. You should probably focus on yellow to red at this point of the season. With smaller bodies of water, drop offs are gold. I can't tell from the map if any of the banks drop off dramatically. Move away from those "slow sloping" sides and find some deeper water.
No Sonar Tips
I fished all my life without sonar until this season. First, get polarized sunglasses if you don't have them already. Second, water color can tell you a lot about the depth. Dark water often correlates to deep water. Look across the surface of the lake...can you spot color changes? If so, get to that line and try and work your way around to get a feel for the bottom. Am I an advocate of the dropshot here? Yes, because it works.
Senkos and Plastics
From my experience, senkos and other soft plastics will usually tell you a lot about the fish's attitude. Do lizards work? Yeah, I've had decent success. If I had to pick two baits to fish with all day though, it would be some sort of stickbait and a jig. Don't worry about color...stick to your basic black, browns and greens. I rarely use senkos anymore simply because I know I can catch fish with just a flip of the wrist. It's a great way to find the bite and to figure out what depths the fish are staging at. Don't limit yourself to one technique though, a simple change in "action" such as a jig over a lizard can be a successful change. If you have to retie 100 times a day, then do it, but don't leave any stone unturned.
If you have multiple rod combinations, then you're set. Tie on a few different presentations and have at it. A boat helps tremendously, and sonar can help find certain useful features of the lake. But they don't shape who you are as an angler. Keep working and you'll come through the other side just fine.