Ladies and gentlemen, I apologize for the late notice. 

There will be 1 month downtime between Keyes' campaign and My campaign. Please have your characters in Gold Bar if you may

As for Elle during this downtime, she dissapears from Gold Bar for the entire duration of the downtime, almost immediatly after returning from the adventure. She does not return before the adventure starts. (for those who may travel to Orlean, she ends up there)

Since I am dm'ing, I am currently comming up with a story as to what she is doing. I don't want to go into too much detail (as what she does will let the party know how long I expect the adventure to last). What are the rules for DM PC during the session? I was intending to treat it as downtime but much more roleplay fleshed out, and had a interesting idea for how she makes the money the party will on the adventure. Do we have rules already in place for this?

We don't really have a "ruleset" as such.  The basic idea is come up with something that works from a storyline perspective.