Do not plan around a guaranteed river crossing
River crossings are unpredictable wildlife events. Even during the broader crossing season, timing can shift with rainfall and herd movement. Build a trip that is rewarding for wildlife viewing even if a crossing does not happen while you are there.
Kenya and Tanzania serve different phases
The Maasai Mara is associated with the northern part of the migration cycle, while different areas of the Serengeti become important at other times of year. Your travel month should influence which side of the ecosystem anchors the route.
Book high-demand windows with flexibility in mind
Migration-focused periods can create strong demand for well-located camps. Consider route quality, location and the overall wildlife experience rather than choosing a property only because it uses migration language in its marketing.
Seasonal conditions, park rules, fees, flight schedules and availability change. A dated itinerary should confirm the details that matter for your trip.