I thought that these might be of use to others so I'll post them here:
Domestic Abuse Helpline: 1-800-799-SAFE
Legal Help: http://www.abanet.org/legalservices/.../freehelp.html
http://www.abanet.org/legalservices/...irectory.html#
Have you tried calling the humane society for some more information? Someone there might be able to tell you if you can get there by public transportation.
Or, even if they do not usually drop off traps, they might be able to find someone to drop one off to you once they hear your situation.