With AKV
DVC rooms, you will have savanna view only if you reserved savanna view when you reserved. It is a guaranteed booking category that is chosen at time of reservation. Moreover, with DVC you cannot put in any requests during on-line check-in; those must be made by the member by phone through DVC Member Services. If you demand change of room once you have room, they can charge you a $75 fee for doing so. Understand that doing on-line check-in does not result in any advantage over regular check-in other than you may get through the line a little shorter. In other words, your room requests won't be met any better than someone checking in regularly.
Note if you are not a member and are renting from a member, you must make
DDP request through member 48 hours or more in advance. If you are someone trading in through RCI, I am not sure what you to do for DDP. Also, if trading in through RCI, you may get any room, savanna or otherwise, it is luck of the draw and no request is accepted.