2 post lifts

Sorry Craig I see your in Georgia where frost is not issue. Ya just need to make sure you don’t pour on top of top soil and dig that all out first. Non organic base is what you want.
most people pour only over 6” of compacted 3/4” crushed stone so water can drain away from the pad. Again not freezing like what I deal with here in New England. But also not creating a pond under the pad and allowing movement allowing for concrete breakage. Concrete is a great pad but it does not flex well. Lol!