This dosn't have to be difficult.I pull a 14ft tandem axel cargo trailer loaded with tools almost every day and when I'm not dragging that, I pull a 14ft Trail Load (one of the heaviest built on the market IMHO)dump trailer rated at 18,000 lbs.I keep the same tires listed on the stickers and run them at the Max inflation stamped on the tire.I find running at max inflation will make the trailer pull easier and turn easier,so much so that I can tell by the way it pulls that I have a low tire.Same thing with my truck,max inflation stated on the trie.And keep this in mind,if you have a WD hitch your transfering some of the weight to the front of the TV.
2010 298 RLS Eagle
99 Ford F-250
1 Toy Fox Teror
1 Tiny Chi Chi Wa that rules all of the above.