With the tow package, the mirrors themselves are power and heated, and they manually flip up and out to provide the extra visibility around trailers. However, they do not (at this time) support the side view camera's, so if you are purchasing the advanced safety group with the 360° birds eye view on the screen (available on Laramie and up trim levels), you will not have that particular feature. It also delete's the front camera as well, because the front camera is only used in the 360° view.
The trailer tow mirrors do not power fold either, so if you are purchasing a Big Horn or higher trim level (such as the Laramie) you will also lose the power fold ability, regardless of your selection for the advanced safety group.
Here's what's included in the Trailer Tow Group:
Trailer Tow Mirrors
Trailer Brake Controller
My truck already came with the same class IV hitch and 7 Blade trailer wiring (Pretty sure all Hemi 4x4's do), so the only thing I have to do to get the tow package and keep my 360° camera, is add the trailer brake controller, which you can select as a stand alone option when ordering, or have added at any time after the sale.