I think your best request is to ask for a partial savanna view
Did you book through Disney directly, or did you book through DVC member services (whether renting, or your own)? If you booked using DVC points, either you or the DVC member you rented from can ask member services to put that request on your reservation. If you booked through Disney you should be able to call and ask that they make note of your request. I would call again 5 days ahead of check in and re-confirm the request. Worst case scenario your request is not honored and you can always ask at the desk about getting a partial savanna view. If you are a touring plans subscriber you can also utilize their fax request service.