to NGA and the SE Gardening Forum, Mattieus. We'll try to help you as much as we can. We do have an expert on site, but he's not on this forum much. He is
@TheCitrusGuy and a special member of the Camellia Society. I've tagged him, so hopefully he'll respond sometime soon.
In the meantime, I will try to help. I do grow a couple of Camellia Japonica in zone 8a SC, and can tell you that they are not difficult to please. Both of mine are in my front border and one of them is between the house and sidewalk. That one gets the morning sun and some late afternoon sun and still does well. Too well, in fact. I need to learn how to thin the plants.
But that's a project for another time.
I've only rarely needed to add sulphur to combat the leaching from the foundation. Either location should be fine for you, but you'll probably get more blooms in the sunnier location.