In the Explorer's case, I think engine downsizing with forced induction works well enough, but if you're regularly in hilly country and have a large family to tote around, you might want more power. (cnet.com)
Just 3 hours by road from Victoria Falls, Camp Hwange is ideally situated in a private concession inside the Hwange National Park, in the Sinamatella area, which is known for its rocky, hilly country with thick teak woodland. (somak.com)
For regular towing in hilly country, I'd order a different axle than the stock 3.08 ratio, since the truck did hit some high revs going up steep inclines, but overall it handled the task very well. (autofocus.ca)