Yes. Halloween is a nice day of opportunity for transgender people. Here we do not celebrate it, but I already saw some people with funny clothes while I was in Portland, US, last week. While I happened to join a marathon event there, I saw some run while wearing a custume mimicking a cat with a long tail.
In retrospect, my first Halloween as a crossdress was not so much sucessful, as I did not know well about proper fashion, just wearing skirt and heels with apparently a guy face. The little daughter of my friend asked why I wore skirt. Her mom was also embrassed by my wearing skirt, replying to her daughter, "It is Haloween day! Didn't you know that?" If I can do again, I am sure I can make myself look better.
Gemma, in your case, you may try facial foundation and powder.
Barbie~~