I do not generally tell people my ds is not vaxed unless we start talking about it. He has never been in daycare but he's been around other kids at playgroups, public places, etc just like anybody.
I am not fully vaxed and I attended public high school and college (in GA). In high school, my mom filled out the religious exemption saying we do not vax even though I was partially vaxed. In college, I filled out the form myself. If I were to partially vax my son, which I do not plan to do, and wanted to send him to school, I would fill out the exemption saying he is not vaxed.