Awesome sketches Terri. I am such a visual person and need to see things in order to have an idea of what something will turn into. : )
Linda the new photos are wonderful I can see so many possibilities with your photos and Terri's sketches. Some sedum will want full sun and others will thrive with more shade, especially with your intense southern summers. Same with the semps, there are those that can handle a lot more sun and some that will suffer if they get to much intense sun. You will have to feel your way with this plan. Be will and ready to change some of them around if they are showing to much stress.
I also see such an opportunity to add even more interest your your planting palette by adding some other alpine type plants.
I think I am beginning to drool over the prospects.