Even though you didn't state it, I'm assuming your SO is circumcised so he doesn't have the "equipment either and therefore he has no vote. That means the only one who has a vote is the baby and the decision will just have to be delayed until he is old enough to decide for himself. Of course, the chances of him ever doing that are about 1%. Not very much!
Also, the area where you are moving has a very low circumcision rate of less than 40% so if your son is circumcised, he will very much be the unusual one which would seem to bring questions of "What the heck were you thinking!" Just across the border in Canada, the circumcision rate is less than half that so a few more miles would mean very much unusual, so much so as to really stand out!
The New Testament is very specific in it's teachings about circumcision and the message is "Christians shouldn't." Since the religious issue is so incredibly hot, it is not allowed to be discussed here. If you will "Private Message" me, I will be happy to provide you with scriptures on the issue.
If you advise your OB/GYN and pediatrician that you absolutely do not want your son circumcised, it is highly unlikely that they would consent to it. That would be unethical. However, it is not impossible to find one that would do it. The thing you have going for you is that there are many more along the west coast that refuse to do the procedure at all and most would find it fishy if a father brought an infant in for circumcision and nothing else and would probably question it. Since he is not legally the father, he has no legal authority to have it done and the doctor could be held liable in a court of law. I suspect because of the above, he will give up before he finds someone who would perform the procedure. There is always the possibility of getting a court order preventing the procedure.