I towed 6,000 pounds with a 1/2 ton, it can be a nerve-racking workout at times. At times, it can go perfectly smooth and it's no big deal. Just depends on traffic and weather (i.e. wind).
This weekend I had my maiden voyage with my new 3/4 ton and new trailer (around 8,000 pounds and 33' long) and I can tell you that I would NOT want tow that trailer with a 1/2 ton!! At least not on the interstate in traffic and wind.
Do yourself a favor, make your travels less stressful and get a smaller trailer or a bigger truck. I am not saying a 1/2 ton won't do it, it's just a 3/4 does it better. 1/2 tons are capable trucks, but 3/4 tons are built for it.