No, if you go on a private safari with Northland Tanzania Safaris, you won’t have to share the car with anyone. You and your partner/friends/ family will have your own vehicle and driver-guide.
This allows you to explore at your own pace rather than being tied in with a group schedule. It is not advisable to travel after dark, and the national park regulations need to be adhered to. But if you want to stop and look at the giraffe for half an hour, or you decide you’ve had enough for the day and want to go back to the lodge and rest, you can do so.