Not sure you're applying the rules in the right way.
At page 172 of the Core Rulebook: "In an area of bright light, all characters can see clearly." and "A creature can’t use Stealth in an area of bright light unless it is invisible or has cover." And again: "Normal light functions just like bright light".
So if we assume that the light at the camp is a normal or bright light (eg. fire, a big tourch) the wolf in that area cannot use stealth, so the DC would be just 6+2, without +16 of stealth.
Does it make sense?
