Scenario was so adamant about them NOT working anywhere close to Minhiriath so probably not, but I actually found it strange - SPOILER - how the spy woman from Rohan just runs away into Minhiriath with her report for Saurman in BtS Epic and... what? She won't appear again anywhere in Rohan nor Isengard content, which is strange now, plus, if she were to reappear in a "major" way that mingles with too many established characters from Rohan (so future Epic) that's kinda off because not every player would have done BtS storyline (it was supposed to be alternate one, and it was constructed like it - that's why the major character who has established relationship with the PC gotta die dramatically, otherwise would have been problematic/off into later content). I mean, sure, you can just tell she was one of his many spies and perhaps met a sad end off-screen, being too trusting of the wizard, but... would be unlike SSG to specifically introduce a character like that and just discard them, even though it could have been resolved in BtS if only they caught up to her. So my guess is: she never reached Saruman, was stranded in Minhiriath instead for reasons and might be used in its storylines. Still a bit off, taking into account the betrayal and the impact on BtS PC (but none on non-BtS PC). I guess they can just only mildly hint this familiarity by having alternate dialogue somewhere for BtS player and non-BtS player?

PS: Now, I haven't reach 32 yet and wasn't in Rivendell, but my safe bet is she doesn't appear again, correct me if I'm wrong