We are also struggling to come up with ideas. Our health system prohibits us from buying gift cards for volunteers, and the Auxiliary has so little gift shop income from this year they aren't interested in paying for that either. Right now, all we're doing is Christmas/holiday cards. It feels so little though.
What are you putting in treat bags? And are you located in a warm climate? We're in KY, and planning anything remotely outdoors in December is tricky (could be 60 and sunny or 20 and snow).