An update for the informal survey. I have been out of wifi access for a while. At Dick's Campground in Great Falls there was a caravan gathering for the trip to Alaska and had 12 new or relativity new diesel class a lined up with toads. Some observations.
1 all but one had small cars used as toads.
2 Three used tow bars with ball type hitches
3 None used tow bars with reactive type brake actuators(like a uhaul trailor)
4 one had an air line for air brake assist?
5 talked to two folks, one said he did not use toad brakes because his MH had plenty of brake capacity. One said he did not use toad brakes because they were prone to failure.
6 The other may have been using toad brakes activitated by brake lite systems or not.
Learn a lot by listening and watching
pops