Check out this post
about a recent adventure I had towing a new 2104S with my Frontier crew cab. The trailer has a dry weight of about 4150 pounds, which is well under the 6300 pd towing limitation.
Search this forum and you'll see tons of info concerning a truck's real
towing limitation. The biggest concern is exceeding the combined gross vehicle weight of your Nissan. Dry weights can be very misguiding concerning your TV's ability to pull. Frontal area and the TV's wheelbase are also factors.
I towed my trailer about 150 miles or so, mostly freeway, bringing it home from the dealer. I was as light as possible...just me, a tank of gas and a few bottles of water* in the truck and the only additions to the Rockwood were propane and a house battery. The truck performed fine, but I wouldn't want to use it on any major trips. Cargo loading is very limited and forget about anything in the tanks.
My experiences, good luck with yours
*also a small bag of Doritos. Gotta carb up for the drive!