A – Ideally, I’d recommend getting two camera bodies if you can, so that you don’t have to keep changing lenses when there’s great wildlife action in the park. If you keep changing lenses, you not only miss the moment, but also increase the risk of getting dust on your sensor. On the other hand, if you could afford it, I‘d recommend two cameras, getting– one with perhaps an 18mm-200 mm, or 70mm - 200mm lens – and the second with a long lens (maybe 400, 500 or even 600mm). That way, you’d be prepared for most shots and can focus on getting the shot rather than desperately trying to change lenses when the action starts.