Hello,
You have been given a lot of great advice but let me pile on. Being a bit of resident social scientist I have done a lot of field studies when out and about. I did post a thread about blending in with the local population when out and about. Perhaps it might be a bit of help for you. Good luck and most importantly . . . confidence when out and about will help you.
http://www.crossdressers.com/forums/...ing&highlight=
Hugs
Isha