The 1500lbs is for an empty car with an empty truck. That 1450lb trailer is also, probably empty. If you weigh less than 50lbs, are going alone, and have no luggage of any kind, then why are you even bothering with the trailer for such a trip?
If, however, you have a 500lbs of family members including driver, 100lbs of food and a couple hundred lbs of luggage, you're 600-800lbs over your towing capacity. It's not going to happen.
Source: That manual in your dash and the info on the trailer brochure you looked at.