(That's you, Sheila, if there are no groups within 100miles of you!)
Some ideas -
Write/contact local Friends organizations & ask if some folks would be willing to come and visit you for worship? I know there is quakerfinder where you can look up worship groups in various places, and I guess you could remember to explicitly ask that the people you talk to are christian (!)
And: local outreach "if you can't find Friends then make them??"
Could you make leaflets to give out locally? Do you know other people, other families who are seeking or like-minded? There may be Friends organizations in the state who might be able to send you leaflets and flyers to use?
How about advertising locally - local free papers? Town websites?
I guess there must be guidance for planting Friends churches. Used to be a Simple Churches ministry, not sure if those Friends are still around, their blog hasn't turned over for a while that I've noticed.
Any other ideas or suggestions about what has worked?