Maybe I should say that I have actually 8 days - the flight home is very late at night (I think it is 11.55pm).

who are you gona be on safari with? if in a large group, maybe 5 days max if on your own 3/4 days safari. Naivaisha is nice for a couple of days or in a week you could fit in a few days safari and a few days on the coast near mombasa. if you want to do something different but quite amazing (that was my experience anyway) you could do a 7 day safari (journey) up to Lake Turkana and back. It is a bit different to the typical savannah "safari", youll see far fewer tourists and there are opportunities to go to some of the national parks and see animals.
