M. - I took a very different approach so I will tell you what I did and if you decide to go this route, good luck and let me know what happens!
Once I narrowed down my list of potential docs/practices, I called the offices ahead of time to find out the simple stuff like office hours, what happens in case of emergency what are the hours etc... all the stuff you don't want to ask the doctor(s) when you get in front of him/her. I wanted to make the most of that face time so I weeded out as much as I could via the office staff by phone. You won't have a ton of time with the docs so make the most of it by getting that simple stuff out of the way.
I made appts to talk to the docs (if this is difficult to accomplish this could be a hint of the attention you will get as a patient). I arrived about 20-30 minutes early to each appt, so that I could wait in the waiting room for a while, and WATCH the office in action. How long did people wait to be seen? How friendly did the office staff seem to be to the waiting families? Did it appear to be a well oiled machine in progress or were people huffing and puffing about the wait, the service etc... You will also have a chance to talk to a few moms/dads in the waiting rooms, ask them how they like the practice/doctor(s). You may learn more in the waiting room that you will ever get from the staff/doc.
Are there two waiting rooms - one for those feeling sick and one for those feeling ok for well visits? They should be separate especially for babies visiting for a simple well visit.
Most doctors are expecting you to drop them the abundance of questions that all the 'expecting' books have ingrained in us to ask. Instead of asking those, off the bat I told my pediatrician I really only had one question. I asked my Ped to explain to me why I should choose their practice over any other. That will take them off guard and they will have to sell YOU on their practice. They will have to earn your trust as a patient. It changes the way they will see you as a parent, I assure you.
When I did this, the doc I ended up going with asked me at the end of our meeting "Will you choose our practice?"
Then he told me he never asked anyone that before! He said he felt like he was being interviewed for a job and I said in a sense he was!
You want the doctors to tell you why they are the docs who will care for your child the best. It is afterall an honor you are granting them to take care of your kids. You shouldn't feel like they are doing you the favor for letting you come in and pay for treatment/services!
Good luck!