Serengeti Safaris from Karatu
We are planning on arriving in Arusha in early October. I thought rather than spending a few days in Arusha to decompress, we could go to Karatu, spend a couple of nights there, and use it as a starting point for safaris to the Serengeti and Ngorogoro Crater. I read that there is a bus that you can take from Arusha. Plus, I am interested in some of the cultural sites and other things to do around there.
Is this a good idea, or should we just stay in Arusha to decompress, and them start our safari from there?