I am new to this forum, but i do have a quarter million miles of towing expetience in 2wd Chevy pickups, and over a million more without the trailers, in those pickups.
And without a traction differential, it's really 1wd when things get slick.
I have been delayed, but never stuck. I have wished for traction diffs, and never regretted any of the few i have had.
Not once would true 4wd have kept me from being delayed, and I've never had to get to the store in a blizzard. I keep all the usual first aid supplies on hand in my home and each of my vehicles, plus a supply of Gatorade and granola bars.
Suburbans as tow vehicles has extra merit for 2 extra reasons, both shared with fullsize vans: compared to a pickup, easier to sleep in, and improves the aero of the trailer.
Taking my '95 Cherokee 4.0 off roading recently, these dirt roads didnt require more than 1wd, but the AW4 not giving any way to hold first gear meant i needed low range for engine braking on descents, or i would have boiled the brake fluid.
Low range is also great for loaded hill starts with a manual.
If you have a 4x4 that isnt your tow vehicle, and you have a spouse who is comfortable driving it, then a 2wd tow vehicle is a fine idea.