One can still be antagonistic and cooperative, IMO.
IMC, the Sun Dance is strictly a Rover observance, and Rover shamen tend to follow an entire pantheon of deities. Some of the more "primitive" Flan or Flan-influenced cultures IMC, such as the Rovers and the Old Faith, don't see the relationship between Nerull & Pelor as adversarial as the more "civilized" cultures.
I've just submitted a two-part article on Rover religion, myth, & ritual that you may enjoy, & I've also written an article on druids for Canonfire: http://www.canonfire.com/cfhtml/modules.php?name=News&file=article&sid=159