Newbie: 1/2 Towable Cross Country Trip Suggestions

670 lbs is the dry hitch weight, can't go by it.
By the time you load that 32 ft trailer with a GVWR around 8500 your looking at a 1000 lb tounge.

For ease of mind and preservation of tow vehicle I'd look at shorter and lighter and pay more attention to GVWR of trailer vs dry weight as most of the trailers your truck can safely pull will more than likely have lower CCC and weigh in closer to that GVWR.

If you buy new have the dealer throw in a WDH.

Enjoy the adventure and stay safe.