Don't tell anyone until you go home! Then request that they give you 2 days notice prior to visiting (immediate family excluded if you like).
I really think we as mothers need to take control over that situation again. I cracked it with my first, I was in labour, a LONG 47.5 hour labour, and my XP father was at the hospital almost the whole time, taking my XP out of the room to ask how I was going, blah blah... Yeah I get he was excited, his first grandchild but GEEZ!
This time around, I only told people that I wanted to come visit, and told them to keep it quiet until I told other people. I had 4 visitors at the hospital