Not sure where you are located, but C&S auto accessory in Drayton Ont. is a great place to rent enclosed trailers. I’ve rented from them and they have trailers with wheel chocks on the floor.. check out there website http://www.candsauto.ca/mobile/trailer-rentals.aspx
I don't think I would put 3 street based bikes on this kind of light trailer. maybe if you could put two bikes on the trailer and one in the truck?
or two bikes in an open u-haul and one bike in your truck?