When I was pregnant my target was 65-85 which was my choice. My gyno was fine with it and since my A1C was in the 5 range, he didn't even bother with an endo for me. My current endo isn't happy because i still keep my target at that range but I have found that is where my body functions best at.
I had a lot of low's when I was pregnant with my daughter. Even in the third trimester when most have high's I was still having lows and she was born small but healthy. She is now an ornery 3 year old. She was born 6 weeks early weighing 4.5 lbs. Highs are worse than lows for the baby. The most important is that you do your best to keep it in a decent range during delivery so that your baby won't have blood sugar problems right after he/she is born.
Anyway your insurance will pay for a CGMS? I had one while i was pregnant and it was a godsend. Especially when i was in labor. I would find out if they are going to put your baby in the nicu as a precaution before you go. A lot of doctor's do for at least 24 hours to make sure they have no blood sugar problems. Ask them what they will have on hand to treat highs or lows during delivery iv wise in case it isn't responding to your insulin pump. I would make sure you have your infusion set out of the way of any possible c-section or on the arms where they might put the blood pressure cuff.