How many days in Tanzania?

If time is tight, reduce the number of safari parks or remove the Stone Town extension rather than turning each stop into a one-night transfer.

Add safari nights according to wildlife priorities or extend from Stone Town to the Zanzibar coast only when a separate beach chapter is worth the additional time.

For a shorter safari, remove one park or reduce staging nights rather than making every reserve a one-night transit stop.

Add nights where wildlife priorities and season justify them before adding Zanzibar or a second safari region.

With ten or eleven days, shorten the Zanzibar chapter or reduce the number of safari parks rather than trying to preserve every stop with one-night stays.

With 16–18 days, add safari nights where wildlife priorities justify them or extend the Zanzibar coast stay; keep the exact park order flexible for season and operator logistics.

Remove Tarangire or reduce the number of parks if road hours start to overwhelm the safari.

Lengthen the Serengeti or add a rest night in Arusha before adding another activity.

For a shorter trip, reduce either the safari circuit or the beach stay rather than cutting both into rushed fragments around flights and transfers.

Add nights to the safari region that matches wildlife priorities or deepen the Zanzibar coast stay before adding another park or island.