Hi Joseph,
Disney's Animal Kingdom Lodge is such an amazing resort. To be able to see exotic animals from your balcony is truly unbelievable.
There are three savannas at Disney's Animal Kingdom Lodge - Uzima Savanna, Arusha Savanna, and Sunset Savanna. Rooms that look onto all three will offer views of the animals; however I believe that many people prefer the Arusha Savanna view because it is the most expansive and is at the center of the main building of Disney's Animal Kingdom Lodge. If you imagine the main building of Disney's Animal Kingdom Lodge shaped as a "C", Arusha Savanna is in the interior space of the "C," with Uzima Savanna and Sunset Savannah along the outside of the "C." The main area of Disney's Animal Kingdom Lodge, the one shaped as a "C," consists of the Zebra Trail and the Kudu Trail. There are two other smaller wings, Ostrich Trail and Giraffe Trail. From Ostrich Trail, there are also some views of the Sunset Savanna. As to a floor with the best view, I tend to like a higher floor as I feel that the panoramic view of the animals is better. We bring binoculars with us for better close up views of the animals.
As to the bunk beds, a room with bunk beds is actually a different
room category at Disney's Animal Kingdom Lodge. I suggest that you book the room category you want with bunk beds if it is important to you to have bunk beds in your room. It is possible that there might be a room available with bunk beds when you arrive, but this is likely an upgrade and you might have to pay the difference, or might find that there are none available. I always suggest that you book the exact type of room that you want ahead of time so that you will not be disappointed when you arrive.
I hope that these thoughts are helpful for you, Joseph. Please do not hesitate to ask if you have any further questions.