We have been pulling a 23' Trail-Lite with our Frontier with no problems. Get about 10-11 mpg. Haven't pulled up any huge mountains, but been over just about every one in our neck of the woods. I turn off overdrive when pulling so there is less shifting on tall hills. I have no problem maintaining 55 mph on the Saluda grade or on I-40 near Asheville in 3rd gear. According to the CAT scale, I have about 3000 lbs. in reserve for combined weight. Never had a sway issue, hope not to. Always at 65 mph or less. Use an EZ wd hitch, no sway bar. Hope this helps.