The Rocket can definately tow the weight. That is until you put all your stuff in it. Steve, you mention "for promotional use". Do you intend to put a lot of promotional weight inside? The problem you might run into is the excess weight on the tongue. We pull two differant trailers. One is from Wags.
http://www.wagstrailers.com/default.asp. And the other I think is a camping trailer from Leisure Light. I might have the spelling wrong but here is a link to see what they look like.
http://www.compacttrailers.com/
We use the wags one for shopping trips to big city for Sams and Wally World. The camping one obviously is for when we are in a spot more than one night while traveling. In both we put a lot of stuff. But I know that with the camping trailer we watch the weight pretty close. When in tow, both trailers pull so good you have to remind yourself they are there.