Who stays the longest in the Serengeti ?

Hi,

I'm planning on spending 4-6 weeks in Kenya, Tanzania (excluding
Zanzibar) and hopefully Botswana. I plan on doing as much wildlife
viewing as possible and I'm checking for non-lodge packages.

I'm presently looking at different safari providers but they all seem
to stay only one or two nights in the Serengeti. Do you know any
provider that spends more time in this park ?

I've done a 13 weeks Africa overland a few years ago but there was too
much driving, too much drinking and not enough game viewing to my
taste. I'm trying to find a way to spend as much time in parks as
possible.

Any help will be greatly appreciated,

Thanks a lot,

Louie