So we did take her out and ended up doing way more houses than we expected to. She really got into it - although a few times she thought we were actually going to visit people and tried going into their homes.
Pretty much everyone thought she was adorable and I now know a few neighbours on a first name basis that I did not know before.
I'm really glad I did it. A lot of the neighbours seemed to anticipate the smaller kids and had a separate batch of treats appropriate for littler kids (things like welchs fruit snacks - which she LOVES - and juice boxes). Someone even had
mum-mum snacks for the babies, so obviously they seemed to expect it. I loved that idea so much that I've tucked it away in my mind for next year.
We tried doing an indoor trick or treat thing at the mall, but that didn't work out. It was supposed to run from 5pm-7pm for children up to 10 years old. Unfortunately, according to several store employees, kids started trick or treating there at 4pm and they felt obliged to hand out candy. So when we got there at 5:10pm, almost every store was all out of candy. Very disappointing. Too many screaming and badly behaved (older) kids there, too.

The neighbourhood thing was lots of fun, in spite of the rain. I found that most of the other kids on the street were well-behaved and considerate of the smaller ones.
It was my own first time trick or treating, too. Very fun!!
