There are only a handful of options within the park boundaries, but they come with the advantage that you can be out among the wildlife from dawn, unlike those who have to drive into the park from elsewhere. Staying atop the escarpment does, however, generally mean sweeping views. Mto wa Mbu is another good base for visiting the park, especially for budget travellers.
Try removing some filters. Alternatively, there are some nearby lodgings with availability below.