If you're like me, and you completed the Natural Order quest without siding with the Travelers, then you wont be able to access the Star Camp. There ARE OTHER FENCES that you can go to, including the other Traveler Camps. So don't worry if you can't access the Star Camp. The others are:
Moon Camp - Located just above the letter "T" in Tywili Coast
Sun Camp - Located east of the word Apotyre", at the edge of the sea
Rathir Lower Tunnels - Located on the Tywili Coast, Gelphyne Nargyfier works as a fence if the quest "Second to a Duel" has been started
If all else fails and you can't use any of the fences listed, you can also upgrade your mercantile skill to allow for fencing. The highest milestone allows you to sell stolen goods to anyone.