It's not the low speed maneuvering that is the concern, its the ability to handle the trailer at highway speed that is the concern. I agree with others that you need a much smaller trailer for your truck. You need to figure out what available payload you have with your truck and work backwards from that figure, not tow rating. My truck is rated to tow 9300 lbs, but would be over its payload rating (~1450 lbs) with a trailer over 7,000 lbs loaded, which means 5,500 lbs or less dry, which is right where my trailer falls. I wouldn't want to tow anything larger. And it's not a power issue, its a stability issue with the less capable chassis of a half ton truck.
Chose carefully or I suspect you'll be shopping for a new 2500 truck very shortly.