I know the lower part of the bumper can be removed for off roading.
Per these instructions: WK2 Lower Front Fascia (Removal & Installation) | Chief Products
In the comments, it says:
These instructions apply to all WK2s (2011-2016 Jeep Grand Cherokees). Even though the WK2 received a facelift in 2013 with a new lower front fascia, all of the steps are exactly the same for 2011-2016 WK2s. All of the fasteners are located in the same location.
Can anyone confirm if they have tried this before? Same location vs exact same location? I couldn't find anything when I search the forum... oddly.