The shape of the trip
This is the route many first-time visitors to northern Tanzania end up choosing, and for good reason. One night near Tarangire, two in the central Serengeti, one on the Ngorongoro highlands, then the crater on the way back to Arusha.
The order matters. Tarangire is close to Arusha, so the first day is gentle. The Serengeti sits in the middle, where the second night buys you a full day with no transfer. The crater comes last because it's on the road home.
Why two nights in the Serengeti
With one night you arrive late, leave early and see most of the Serengeti through the windscreen. A second night changes that.
Day 3 is yours. Go out at first light when the cats are active, come back for a late breakfast, head out again in the afternoon. Or take a picnic and stay out all day. Your guide can work the Seronera River for leopards, the kopjes for lions, or wherever sightings are being reported that morning.
The long day is day 2, about 6 to 8 hours from Tarangire to Seronera with game viewing at the end. Day 4, coming back, is about 5 to 6 hours with stops.
Comfort and luxury versions
The comfort version uses mid-range tented camps and lodges near Tarangire, in the central Serengeti and in the Karatu area. They're comfortable and well placed for the game drives.
The luxury version keeps the same route and the same private vehicle, and changes where you sleep: smaller camps with more space between tents, a more secluded spot in the Serengeti, and a lodge or camp on the crater rim. The rim also shortens the morning drive into the crater on day 5.
When to go
June to October is the classic window. It's dry and clear, with Tarangire at its best. January and February are also good. The migration herds are usually on the southern plains around Ndutu then, which is a detour from this route; ask if you'd like to fit it in.
The long rains, roughly April and May, bring green landscapes, fewer vehicles and slower roads, and some camps close for part of that time. For more detail, read the Great Migration month by month.