Your trac is rated at 5500 lbs towing. It'll tow the weight you stated, but you'll know it's back there. See my library for pics of mine, which weighs right around the limit, fully loaded. the dry weight was 4300. Keep in mind, the frontal area is just as important as weight. the longer the trailer, the better it'll tow. I would suggest Light Truck tires to help with stability, along with anti-sway and load distribution bars. You'll need electric brake controller and an external trans cooler, too. Do a search of my login name over the past 10 years and you'll see a lot of info.
Expect to see 10 mpg towing. the hill will be a challenge, but it'll pull it. I would look at hybrids, or lightweight from areolite, trail-lite, and the like. they are not as tall and wide as normal trailers. Consider a Hi-Lo type also.
I've towed this over 18,000 miles in the last 11 years, including the grand canyon and back to NY..
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