It's nearly a guarantee that you have at least two homeschool groups in your area: one explicitly secular, one explicitly religious. Don't be afraid to go wading in the pool of the "other" group.
we haven't had much luck with the more religious groups (as heathens). The mormons are actually really cool, so I agree, cross the fence. It doesn't always work out, but it is worth the effort because we live in a broad world and everybody has something to offer.