Our honeymoon was a trip to Africa, and we did Kili (Shira route). We did Kili “private”, i.e., not with a group. (It *was* our honeymoon, after all!)
Although we used an “outfitter”, we used a LOCAL one who offered various levels of service (at various price levels). To me, that was the best of both worlds, because you didn’t have to worry about the boring “nuts & bolts” stuff like permits, but you could choose whether or not to bring your own food, equipment, etc. That local outfitter is great to deal with, and the internet makes that stuff easy!
If you’d like to know more about that, feel free to message me.