Too many! All invited, and I am willing to be a learning opportunity for my fellow doulas/midwives...
Me, dh, & our two daughters (5 & 8).
At least two midwives.
My doula, and maybe two student doulas (one is a chiropractor).
My sister and BIL who are driving in from out-of-state when I start labor.
MIL, FIL and GMIL (to help w/my kids).
A midwife friend to video the birth.
A close friend who makes me laugh.
I don't expect them all for the duration, some may come and go, or just arrive at the end. Some are coming to witness a homebirth, which is such a rarity and special treat. I don't mind being gawked at, better at home than in a hospital!