If you drive using engine braking more than using your service brakes, 4wd does handle slowing better on adverse surfaces. I can go down a slippery incline in 4-low with engine braking working on all four wheels and only need to lightly touch the service brakes. Even with low gearing on 2wd (creeper first gear), you cannot do this without having the back end start sliding and trying to get sideways.
If you camp anywhere where the sites are roughed in and not in a manicured RV resort, you will eventually find a need for 4wd or the availability of traction material to lay under your drive wheels.
My '89 Mazda, '05 Ford and '15 Ram could not be driven on hard surfaces in 4wd without drive train damage. None of these are AWD and do not have a differential between the forward and rear drives.