I considered pulling a small trailer behind one of my big bikes, briefly.
At that time I was mostly ranging out 200 miles or so to mountain areas, camping. I wanted to be able to haul a large cooler, tent, awning, some folding chairs, etc.
I found a manufacturer in australia who made a trailer hitch setup for my bike.
Luckily, before I took the plunge I had the realization that the cost of the sportbike tires per mile was a significant factor, and riding the bike for long distances to get somewhere was not really saving money when I had a 6 cylinder pickup that would get 19-20 mpg, hauling the bike in the bed, or a small trailer.
With the current trike, I'm not sure what the MPG is? I am starting to lust after one of the trikes with the 600-650cc subaru engines in them, but the riding position and room for driver don't look enticing, but most are built in small shops who can do custom stuff. They will do freeway speeds.
I do about 60 KPH on open roads and streets, it will do 80. I do get to pass an occasional vehicle.
I do get a lot of attention, and one older thai guy who was riding a vintage honda scooter, probably proclaiming it was 'made in japan', talked to me at a gas station and assumed I had just rode in from a nearby farm to get gas. 'look what just turned up in the turnip truck'.
For some reason he had two small antennas mounted on his handlebars, he told me 'wifi'.