I have traveled solo with a travel trailer for 20 plus years and never had a problem. Lived full time in a Northwood product, too! I did buy a product called the "tongue twister" that moves the trailer side to side about 4 inches so that an exact match between ball and coupler was not necessary. Most of the time I was able to back exactly perfect without too much of a problem, but if not a few cranks on the tongue twister and it was a perfect match.
http://www.amazon.com/BAL-R-V-Products-Group-28100/dp/B001Y8SREI/ref=sr_1_1?ie=UTF8&qid=1376050527&sr=8-1&keywords=tongue+twister+for+rv