I understand totally.
With my first I was worried that if my mom was there I would wuss out - Anytime I was upset and saw my mom, things got worse - not better. But I was ok with my younger brother being there to photograph and my mom understood.
At one point with this one, I was being rushed down a hallway to a delivery room (read op room) and I was uncovered from the waist down. Cute little nurse was trying to catch up and flick the sheet over my nether regions - I could have cared less.
Child #2, mom, sister, hubby, and photo brother were there. No worries, just get it done.
Child #3, mom and hubby there. Photo brother, he thought he could sleep a little more - he thought he had a few more hours. By then I realized that having hubby and mom there were the best comfort.
My own mom was "knocked out" for her deliveries - mine were the first ones she had actually experienced. I was happy to be there for my sister on her first one - it is not as scary as you might think. My neice is on call this weekend as a doula (like a birth coach) this weekend. I would love to do the same thing.
For you, do what feels best for you. Don't worry about the others. Do what is best for you right now. Once all is said and done - these people will still love you, your hubby and the child you add to the family!