If I want to deliver at ACH should I get an OBGYN there before ttc?

Title says it all. Does anyone have any intel on if this helps you be able to deliver there? I have a gyn currently at a private outpatient clinic but she does not do obstetrics. I was thinking of finding a OBGYN at ACH and then already being an established patient for when/if I get pregnant. Does anyone have any experience similar to this?