I'll try to answer some of your questions....
We have never stayed in a room with a King bed, so, I can't answer that one.
You might want to explain a little more when you mention the "bottom floor". In other words, what is your goal with regards to being on the bottom floor? Do you want to be close to the lobby? Do you want to have easy access to the parking lot?
To understand why I posed those questions, you need to understand a little more about the Lodge itself. The Lodge is 6 floors high, but the lobby is on the 3rd floor. (So, if you want to be on the same floor as the lobby, you don't want the "bottom floor", you want the 3rd floor.) In addition, there are only a few rooms on the 1st floor, and they (to the best of my knowledge) are all Pool view rooms. There are no Savannah View rooms on the 1st floor. (So, if you wanted a view of the Savannah from your room, you don't want a "bottom floor", you want, at least, a 2nd floor room...which is, one floor below the lobby.)
As far as your morning coffee is concerned...you can get that at Mara, which is the "grab-n-go" resturaunt at the Lodge. It is on the 1st floor, but only has access through exterior doors which face the pool. (The exterior area is covered, so, you can get there without getting into the rain.) You cannot walk from any room in the Lodge to Mara without walking outside. To be closest to Mara, you probably want to stay on the Zebra Trail.
You can see a map of the Lodge
here.
As you can tell from my signature, we have stayed there a number of times and plan to stay there again this December. It is a fantastic resort, and I hope that you enjoy it as much as we do. I hope this information has been helpful.