Steve,

One thing that I haven’t seen mentioned is storage of ramps.
You want them to be as close (convenient) to the tail of the trailer as possible
And also they should have a positive means of securing them to the trailer, for both traveling and loading un-loading of the vehicle.
I have seen people just lay them flat on the trailer deck and could only imagine what would happen in an accident

A few years back I lost one on the (un-named) Highway and I don’t know what was worse, trying to find a replacement for it or the fact that I probably ruined someone’s day