In GA we also have thick nasty orange soil.
I've been told time and time again by local farmers that the only solution to improving clay is to work it in with other stuff. The most common thing I hear is "get earthworms to come up", and "till in some coffee grounds and compost as a start, and continue layering up from that point".
When we did all of our beds around our house, I went to the local landscape supply place and got stuff they called "Landscape mix", which was a 'clean' soil product with horse manure throughout, nice and dark, almost grey in color. Took this and laid it about 6" deep, then took a (borrowed) tiller, and tilled the mix into the clay, then took a shovel and broke down deeper into it. Laid a layer of compost from my pile on that, then topped with more 'landscape mix', and topped it with bulk hardwood mulch. The mushrooms went crazy for a bit.
For the following 2 years, I tossed coffee grounds from the local Starbucks (they give out free) on top of the beds, and topped with raked/shredded (mower-over method) leaves from the yard and put on top. I even stole some bags of leaves people were tossing out - I mention this because I wound up with 3 free japanese maples due to stray seeds in the bags ;) - and shredded those if I didn't have enough leaves in my yard.
I realize you may not have 3-4 years of patience like I did. I understand if this is true. But I can tell you that you can dig in any of these spots, and find so many earthworms it's almost silly, and the earthworms have even worked through the clay, leaving me about a 18" of nice dark earth where once clay was.
If I were you, if it's possible, I would get enough bulk 'landscape mix' from your local landscape supply, and lay it about 6"-8" thick over the area you're wanting to change up and till it in, just to get the process started.