I like both of them, but I prefer the idea of being independent rather than affiliated with StarFleet or the Klingon Empire or something.
That's one vote for the traders scenario, and one interested so far, then!
That's the idea i've written more for, so far, including lining up a ship -
http://img.photobucket.com/albums/v734/Craig_Bean05/OrionsFortune.jpg)
Original information about the class of ship here (
http://www.cygnus-x1.net/links/lcars/uss-durance-class-cargo-tug.php)
I'll post some info about the Fortune when I can find what I wrote. But, the timeframe i'd like to set this in makes that ship at least 2 centuries old.
Also, using this map (
http://www.ucip.org/science/newmaps/klingon2.jpg) as a rough guide (I can't vouch for whether it's authentic, but to my knowledge no conclusive map of the area has ever been shown in the show), the general operating area (to begin with, at least), will be around Starbase 234 (up in the left hand corner) - right in range of the Federation, and the Romulan and Klingon Empire.
Also, if you need a hand working on this, PM me. I know a pretty good bit about Star Trek - I'm addicted to Wikis.
Certainly, it's always good to converse with another trek fan. :)