I use a 16ft two axle Big Tex to mostly haul firewood and an occasional rig up to Dodge 3500 crew cabs. Only issue was the stock biased ply tires. Life has been great since those were replaced with the heaviest loads coming in at 7,000 lbs. I've not had issues, but I don't care for the exposed wiring one finds on most trailers. If one has plans for getting off road and out there, it would be wise to rearrange the routing and durability of that system.
Big Tex trailers are good, and I agree with others about the 3500 lb. axle trailers. I would go 5k axles at least on a vehicle hauler, and at least 18 ft. if not 20. My Dodge 2500 4wd weighs 8,000 lbs,. and I was in a sweat once when I simply had to move it on a 16 ft. 7,000 lb, trailer. I would expect a Dodge 3500 dual rear wheel to weight at least that much. IMHO, the initial expense of the heavier trailer pays off in wear factors (bearings, etc.) and peace of mind going down the road.
