If you are buying a trailer, you may want to invest a little in electric brakes for the trailer. My brother did this when he outfitted his Subaru Outback to pull his 12-foot pop-up camper across country for a trip. The weight was right at the maximum the Subaru was rated to pull, so his biggest concern was not taking off, but STOPPING. The electric trailer brakes are cheap insurance and they really do work great.
I just installed a trailer brake controller on my Dodge 2500, and it cost about $60, but all of the wiring was built into the truck. Although my truck is rated to tow 10,000 pounds, you could definitely feel the truck working to stop the 16' trailer with two cubs on it. That total load should have been around 6,000 pounds, and even though the truck is rated for 10K, it was a job stopping. Trailer brakes hooked up, it will stop on a dime.
Also, invest in a GOOD trailer. I have had a bunch of them, from snow mobile trailers, up to this heavy duty 16-foot trailer that I have now. YOU GET EXACTLY WHAT YOU PAY FOR!!!. I had a $1000 16-foot trailer, that would damn near bounce you off of the road when empty, and felt soft and swayed a-lot when loaded. I sold it after my second haul with it. For the last 5-years I have been buying trailers built by PJ trailers
http://www.pjtrailers.com/ and LOVE them. They are very heavy built, pull straight down the road, loaded or unloaded. We have had 2 12-foot, and 3 16-foot PJ trailers, and they were all great. Very easy to balance the load out on a good trailer.
Good luck, and be careful.