I don't think anybody in Aus has much experience with these yet, coz unless you were able to pick up a limited from the first batch of Grands brought in, then everybody else is still waiting to get theirs. My overland isn't due until July
But if it was me I wouldn't get the offroad pack, as without a doubt there will be aftermarket underbody protection offered soon. And realisticaly the kind of wheeling you would be doing in an overland won't be that hard anyway