I know I am the huge minority but I had unique circumstances. My mom and sister flew out to be with me and I planned for them to be in the delivery room with DH and I. Sis was to take pics. My dad surprised me and flew out. I was beyond thrilled because I thought he was going to miss his first grandchild's birth. but I knew a ticket would be so costly.
I thought I would have been more uptight and also would want things to be more intimate but everything about me surprised myself when it came to pregnancy and even parenthood. So I didn't mind that he was also in the birth room. I always thought, heck no!...until the time came and the circumstances were so unique. Of course, I asked him to stay up in the corner of the room to which he, of course, didn't mind. But it was SO cool for everyone to be in the room. They have all told me how much more connected they feel to Taryn. I had tunnel vision during most of the birthing process anyway so I didn't really even realize they were there!
I plan to do the very same this birth. And I am also actually inviting my mentor and MIL if they are comfortable and would want to be a part. I know this is a completely sensitive issue so it is really up to the mom-to-be. One thing I would advise against though, is no kids. I don't want them to get upset if I make any painful noises. If anything, you could just say you want to wait to see how you feel the day of. And remember...you can always change your mind. You are in control because you are the one having the baby.