Four days, three nights, three parks and a wonderful experience. Innocent our guide/friend couldn't have been better. Found the animals we wanted to see, answered all our questions, stopped for provisions and even sourced us some interesting shopping. Not even a vehicle break down near the end of day three thre him; it was dealt with calmly, professionally and with minimal inconvenience to us.
Highly recommended, and do see both Serengeti and Ngorogoro