We didn't. We do not have a family doctor. We used to have a nurse practitioner we would always see at a particular clinic who was pretty darn neutral about our vax status. She's still there so it would be cool to ask for her again. We tried keeping a regular ped way back with dd1 but it just wasn't helpful to us.
Our kids got physicals when they did preschool/school. My ds has been to emergency room a couple of times, had shingles which we went in for, we've occasionally checked on a rash or virus just in case it was something we needed to identify. And our oldest is susceptible to UTIs so we sometimes get a dx and antibiotic although we often can clear one up on our own. All of this can be at a clinic and we can ask for an appt. with a particular doc.
I seriously don't even get the point when it comes to having a particular doctor or doing well baby visits. I don't agree with the mainstream model of wellness, it leaves way too much out and includes too much dumb stuff so for me it doesn't really promote overall health. We have had some wacko negative medical experiences way back when so that helped me sort out my willingness to have a high level of involvement with that system. Typically, I know more than the practitioner or at least as much. I get stupid advice sometimes, prescriptions for things we don't actually need (including just in case abx w/o a dx

) and I don't fill. They are only human and I am good at figuring things out and digging up accurate info. I have had so many experiences where the doctor didn't really know what was going on any more than I did and things didn't really go anywhere.
FWIW I was almost forced by social services to get a surgery for dd1 @ 6mos but when I managed to hold off (with monitoring) until she was 3yo the doctor decided she's been miraculously and spontaneously cured. I won't even go into what a crazy experience that was, but it was rough.
We keep it minimal. That said we know quite a few of the docs here that we might see on occasion and there are three different clinics we have access to where we would likely see someone we know. It's basically a friendly situation.