I've never had much of a problem getting my CD-22 launched and retrieved with my Durango, although on a snowy or icy ramp the 4WD comes in very handy, as did chains on my 2WD Ford F-150 Econoline van in the same scenario.
However, to demonstrate the value of 4WD, a limited slip rear differential, a low range setting on the 4WD, and some oversize 10.5 x 31 inch mud and snow tires, we've hauled my ~8500 lb Sea Ray (includes trailer) out of a mud and sand covered asphalt ramp on about a 6% grade without any problems except some initial slip of those wheels with the least grip till all were biting solid. Absolutely could not have done it with ordinary 2WD.
We use some back roads and tow on the freeway for short distances only at about 50 mph, and all seems well.
The Durango's set up is much better than my Friend's Ford Explorer with a full time all-wheel drive set-up which doesn't have the low range or limited slip rear end.
I've been pleasantly surprised by the capacity of this tow vehicle, but know I must be very careful concerning stopping distances, and am very careful to watch the performance of my trailer brakes.
Joe :teeth :thup