Jason...
No, your right in thinking that there are general priests....the number of priests making up recongized orders of the older god's who surrendered their powers is less than 5 percent. Most just serve the light and invoke the various patron saints as needed without having a special connection to them.
Hmm. Given that Donovan's kind of a 'man of the people' type, then I think I'll stick with that, keeping him unaffiliated beyond being a member of the church and having an obvious affinity for Pelor. Backgroud-wise, the Knights are probably how he found a connection to the church, but he's never joined their order.
jason