I mean. just watch videos of a stock Jeep wrangler going off road, yes there are some differences between the two but it will give you a general idea of how the Bronco will act off road.
Also all those WW2 Jeeps went everywhere with less ground clearance, power and technology, so the bronco...
Odd question, but, what was it like? To own a 69 and 80 year bronco, did you buy them new? What where they like to own? What did you do with them while you had them?