I changed out my 18" wheels for some 17"s. Running factory sized LT rated BFG A/Ts.Its going to be all on maintained gravel roads. An Acadia would be fine if its not muddy and you have a good set of tires. The washboard out there can be pretty brutal at times and passenger tires can be eaten up.
Also, it has Flowmaster exhaust, Rough Country leveling kit, and a round dial on my center console that gives me 4 modes of invincible.
Oh, it also comes with a dog!