Judy,

My husband works for our local newspaper-- mostly rural area like
yours, small town, all that.  They are more than happy to run stories
about these kinds of things.  I would call the editor at your paper &
ask her to do a feature article on breastfeeding & your prenatal
breastfeeding classes.  Most local TV stations also have a free public
announcement service where they will run notices of your events for
several weeks ahead of time (ours is called "The Community Calendar").
This is also free.  I would call any media outlet you can think of--
newser, TV, radio, and ask about this & about free public service
announcements.

Our local paper ran several stories covering the front page of the
second section on breastfeeding recently.  The number of moms in the
prenatal breastfeeding classes as well as the breastfeeding support
group skyrocketed.

You could also develop a handout to include in any "goody bags" the
OBs in your area are handing out to their patients.  Pregnancy fairs
or women's health fairs are also good times to disseminate information
to parents.

Yours,
Teresa G. in NC