Hello Jill-Connie Lorentsen,
To support this scenario, first dock the panel to the right without hosting the DockPanel and then set it to autohide mode.
|dockPanel1.DockState = DockState.AutoHide;
The xml serialized file must be changed:
|<Left Orientation="Horizontal" Size="94;264" HidePosition="Right">
I hope this helps. Do not hesitate to write me back if you have further questions.
the Telerik team