Tow bars
I have a very different opinion than your first resonse. To me, the risk involved in using a cheap tow bar when towing an expensive toad behind an even more expensive motorhome, is a false economy. We use the Aladdin from Blue Ox, but they are not the only quality brand. But the key to remember is that the choice of a base plate to attach the tow bar can effect the wear and tear on the toad in the miles that you tow. And you want a product that will be reliable for many miles of towing. Another point is that the type of tow bar that stays on the motorhome when not in use is much more convienent than any of the other choices. The folding ones are no doubt next as with the bars that do not fold, it is much more difficult to hook-up and then you have the wish bone sticking up in front when you drive unless you take the time to remove it each time you use the toad. And as far as the hitch ball, that is the place that most toads that ever become disconnected from the motorhome do so. The reason is that if you cross too steep a dip or hump, the hitch can be pryed off of the ball. With the type of tow bar that stays on the motorhome, there is no ball and much less chance of a disconnect. It is true that you must have a safety chain or cable to keep the toad attached in the even of hitch failure, but that just means that the toad will hit you when you stop, rather than some other driver.
The other thing that one should give serious consideration to when setting up to tow a vehicle is a brake system for the toad. There is no state currently enforcing the use of such systems, but in the event of an emergency stop, it could prevent an accident.
As to what we use, we have a Brake Buddy for the aux. brake system and a tow bar and base plate from Blue Ox. They and Roadmaster are the leading manufacturers of such equipment, with Demco in a distant third.