Hey OP, Brevard county neighbor here.
I went through this last year. I have two AGMs in my 5th gen and one in my 4th gen. I still put a charger on my batteries every couple of weeks to keep them topped off, mostly because of lack of use, but I installed a Dirty Parts - Alternator Voltage Booster.
Now there have been plenty of people who have modified a GM diode to do what the DP booster does for a lot less money ($10?), but you eliminate a fuse in the process. The chances of having issues are slim, but still there with a fire being the worst case scenario. If you do the DP unit, make sure you designate you want the 5th gen, as the fuse box is laid out a little different from a 4th gen.
Here is the one I installed:
Dirty Parts
This one is more expensive but a pretty cool switchable model w an over boost mode:
ARC LIGHT LEDs
I did a short video of the install on my 4th Gen:
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