The motorcycle trailer from U-Haul has 30 square feet of deck space, and the dimensions inside the trailer are 7'8" wide by 3'9.5" long. That should be plenty of space for most standard bikes.
What makes the Toy Hauler different from any U-Haul other trailer? Its size, for starters. The entire trailer is just over 23 feet long, with a usable deck measuring 16 feet long and 8.5 feet wide.