I sent an email / text to friends and family as my due date approached explaining my guidelines and boundaries. I then directed any questions or comments to my husband so I could be in peace. Do what you want. This is your time not theirs.
I personally would give them a hint early…. “We would love for you to come meet baby on the third day we are home, the midwife said we will both need time to rest first” or something like that….! And then, just don’t text/call them too much once it’s all happening, give your husband the role of updating MIL once baby is there but make sure he’s clear dr has said you need to rest etc. Tell hospital staff you don’t want visitors if that’s the case.
I haven’t had baby yet but I feel similar. My husband and I have decided that other than just a few close family members we aren’t even going to tell people I’m at the hospital until the baby is here and we’re ready to respond to messages.