Good take on it Frank!
I apologize for my post, regarding it being a hash-over of the ABS. I had only read the first page of posts and did not see it had gone to 2 pages, and missed the posts where the ABS was covered very well.
I do want to comment on tires and surge brakes if only for future searchers... I had a pretty good set of tires on my truck, good tread and less than 2 years old. I had a price point when I bought them and they were ok except they would SLIDE all the way thru an intersection after a rain, seemed to be on just some surfaces. Launching and retrieving the boat was never an issue though, I did not even need 4wd to pull out. All of the ramps I use are cross-hatched for water drainage so I am sure that is a factor in good traction on wet ramps.
One time after a rain I was towing it home and slid thru an intersection. This was all flat ground. I was not going too fast for conditions, and I began braking in plenty of time, the tires just could not hold. I have a tandem axle with surge brakes on the front axle, but with with nothing to push against (i.e. my sliding truck) they did not help much. I had to go into 4wd to get going again after it stopped. I decided to get some advice from a tire shop this time. Based on their advice I went with new tires with better siping, much safer in the wet on even the troublesome surfaces I encounter.