I should have continued on with my first reply. We have a Reese hitch on our Rendezvous that we've been very happy with, using it for the same purposes you want to use yours for. The Reese hitch for the Versa has a 1 1/4" receiver and I do know that Autozone carries the Reese hitches. The hitch uses existing holes in the frame to bolt on so no drilling is required.
To see it, go to the following website and use the product selectors, clicking on the details for your car:
http://www.reeseprod.com/
Whatever you use, there's another reason to be very careful. The Versa, like most vehicles, has the exhaust pipe straight out the back. If you're not careful, it's very easy to melt suitcases or pop bike tires if they are too close behind the tailpipe while you're cruising down the highway. We fried my wife's suitcase coming back from Florida in January. Fortunately, the clothes that were damaged were easily replaceable. It would have been terrible if she had packed anything irreplaceable or expensive in there.