Unvaccinated family members

At what age would you be comfortable with your newborn spending time in close quarters with unvaccinated family members? Thanksgiving is coming up and this is our year to do it at the in-laws and my BILs wife has never been vaccinated and neither have her two young children. I know I can't keep my child from every unvaccinated person out there, but since it will be close quarters and they'll all be wanting to hold/touch him, that makes things a little trickier.  Planning on asking our pediatrician at the next appointment, but curious how other moms would feel.
(If you choose not to vaccinate, I'm not looking for a debate. I respect your right to do what you believe is best for your children, but this question is asking for responses from a perspective that you don't have.)