I haven't seen "personalizable" stoles...ours just have our letters, no chapter name. Maybe your group has that feature. If so, I think it's fine to add it, but not if it includes the other university's name. That would be weird.
The other thing you could do is let the chapter president know your plans, and she could announce it casually in a meeting. Then you've removed anxiety related to potentially having to explain yourself.
Personally, I probably wouldn't wear the stole. Yes, you are a sister, but if you haven't contributed to the chapter at this campus, I don't think it's warranted to broadcast your membership if you think the chapter members will think it's odd because they don't know who you are. I'm saying this as someone who did transfer and affiliate.
__________________
Gamma Phi Beta
|