Hey Bass,
I've had some pretty good luck from Lanier Park. I usually use live bait, and fish from the point just out from the boat ramp. If you pick up just a standard Lanier map (you can get one at almost any bait shop, or BPS) with the Southern Enlarged, it will give you depths and show some good parks. I have the waterproof one and it has everything you could need on it.
I have had better luck from Lanier park in the evening. I don't know if it's because it's so close to the main lake that the water temp stays pretty consistent or what. It seems like you are only using artificials, so you may want to get some feedback from some of the bass guys, but honestly I've had spots hit just about anything I've thrown.
If you are heading back to Lanier Park anytime soon, when you go in, take a left into that little area with the covered picnic tables.. keep going out to that point, and you will see what I am talking about. That point drops off pretty steep and has produced a lot of fish for me.
Good Luck out there!
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- Here's to bent rods and screaming reels.. FISH ON!! -