The fun is being somewhat capable and stoppable. A balance.
If it's unstoppable that you want, then get a helicopter to go over all the obstacles and terrain.
I saw a Zook with a 2.0L engine tackling the rocks at the recent Tuff Truck event. Shows you don't need big engines or long wheel base either. The winner was a Jeep that was even shorter, but balanced for the condition.
