I don't mean to be implying that i am setting the RP in the Shivering Isles, but that for example (off the top of my head) that the Daedric Princes decided to create a realm where their followers would battle each other for the control of the realm...
See, Shivering Isles is good for this because ingame we saw the rivarly between the Mazken and the Aureals who both vied for the Sheogorath's favor. If we hosted an RP in Hircine's Realm, it would probably be the same thing. We always saw werewolves, everywhere in ES lore. Werebears are just mentioned. Hell, Hircine hosts an entire hunt in a large island so he could unleash his Hounds upon Man. Where are the werebears? Hibernating in the Hunting Grounds somewhere.
I also read the Infernal City and I just loved the part where the drivers and the werebears had to step aside when Hircine and his werewolves arrived(And make a note that Hircine hunts with a pack of werewolves, not werebears). So clearly that favoritism alone can create tension between the hunters.
Although I doubt Hircine actually gives a damn.