Best lodging Ngorongoro Crater (w/comfort for elderly)?

Hello, I am trying to figure out what lodging may be the most suitable for relatively easy access to the Ngorongoro Crater in the morning, but will also provide good heating/comfort for a 91-year-old traveler. I was reading it's good to stay near the crater to have a shorter drive in the morning, but I'm also wary of the colder temperatures near the crater. I was given options of Ang'ata Ngorongoro Camp, Ngorongoro Tortilis Camp, Ngorongoro Serena lodge. Do any one of these sound better than the others? Or, is there an alternative recommendation for lodging?