I think for now, an actual order isn't needed really. We just have to be respectful of the other players in the game. Keep in mind that at any given time, there's going to be at least seven other posts that need to be read and responded to because that is how many people we currently have. In the beginning of the posting phase, we were a bit slow on the posting. It only shot up a good deal once most of the players had posted their intro into the story.
I'd personally like to keep us all in one group. Two groups would be hard for this plot to work to be honest as it would detour around the main story. Not to mention I have every intention of the ruins everyone's currently in being a sort of cataclysm for the story to begin. Everyone has a role to play in the story. I even have plans to incorporate Denrig and Halen's homelands into the mix as part of the story line. There will be points in the RP where I'll be making a sort of guiding hand post.
In fact, to keep the group together, even after the sort of explosion of anger issues, I've already got something in mind. As it is right now, I only need Halen to get closer to camp. Even though Cedran has wandered off, I've a plan to sort of get him back with the others as well that's already been put into motion privately.