I don’t know how the state of Georgia handles it but I highly recommend a soils test. The main thing you are looking at is the pH of your soil so you can adjust that if you need to, but you also get a lot of good info on soil type and possibly nutrient requirements. I find it better to know what I’m working with rather than just guess.
If you want some expert help in interpreting your soils analysis there are some pretty good people over at the sister gardening site. We are a small friendly group that joke around and tease each other some, but there is some real good gardening experience there too.
http://www.theeasygarden.com/
There are a lot of variations in the “deep litter method” as actually practiced. To compost that stuff, you need to keep it moist. Most of us don’t so you wind up with a product where the poop and the bedding is pretty much scratched into a powder or fine bits but has not really decomposed. Putting that stuff directly on growing plants can cause problems. If it is too rich in nitrogen (the poop) it can burn plants. If it is too rich in carbons (the bedding) it can rob nitrogen from the growing plants.
There are two ways around that. You can empty that stuff into the garden in the fall so it breaks down over the winter and before you plant it. That’s composting it in place. I don’t know how soon you are going to be planting your garden down there so I don’t know if it is already a bit late for that approach for you or not.
The other way is to compost it. There are a lot of different ways to compost it, some labor intensive and some pretty lazy. I lean toward the lazy side. In either case you pile it up. If you keep it damp without letting it dry out or stay too wet and turn it regularly it will break down fairly fast, maybe two to three months. If you don’t control the moisture and don’t turn it, it will take a lot longer. How much longer? A lot of that will depend on how moist it is. Where you are you should get a fair amount of moisture so probable 6 to 8 months doing absolutely nothing after it is piled. If you lived in a dry climate like parts of Idaho or Eastern Washington State, for example, it could take several years.