Your characters are not particularly sure. You have all been keeping a fairly low profile, and since none of you have ranks in Knowledge (galactic lore), all you know are the basics about the area. It isn't as if Bespin is crawling with bounty hunters, but then again, some bounty hunters prefer to travel in disguise. Of course, it is in the Outer Rim, so there are likely to be more bounty hunters than you would find in the Mid Rim or Core areas. What it boils down to is that you cannot be certain, suffice it to say that there are probably at least a handful in the area.