I hope this will help a bit. I can only tell you about my experience. I am not a doctor and you must trust his/her judgement.
The instruments go in through two sites, the navel and just below the breastbone. I have four tiny cuts. The one in the navel is about a half an inch long and the larger on is an inch long. There are two other tiny insisions on the right hand side of the abdomen made for drainage.
The gall bladder is pulled through the hole under the breastbone. I had a lot of stones. The one they gave me to keep (because I asked) was about the size of a gobstopper.
Personally, I cannot see why you couldn't have this surgery. I believe that the cuts are made in a completely different region to a C section and they are so very small.
It is very sore after the op because the same nerve endings are involved. It feels like you are having a very bad gall stone attack but they give you strong pain relief and within a day or two you feel much better. The fact that you are not waiting for an attack and that you can eat normally again is wonderful.
Good luck. I'm sure you'll be fine. Remember that although it's less invsive than opensurgery it is still a major operation and you'll need time to recover properly. Get the horrible thing out.