hi allnew.
i think the very best thing is to wait and see, like many pp have said.....you can so easily get your knickers in a twist about it now, where as, when the time comes, you have no idea about how you will feel......you may feel like a bag o shite or be on top of the world.....you may want to be alone, or you may feel like being adored by masses!
the great thing about hospitals is the usually strict visiting times...invite both grandmas to visit you there, soon as poss....and then just see how it goes......
my friends on the birth of their first baby ordered no visitors apart from immediate family for the first 10 days or so, then went visiting to peoples houses when they were ready....saves on waiting on people, having guests that won't leave, and also, if you get tired, you can just go home.....
sort of on a tangent....all of my mums friends have sons (i'm the only girl) and they all have dils......they are all so terrified of stepping on dils toes that they all have been misinterpreted at some point as being disinterested, or interfering, do too much, or not enough.......they feel they can't win.......
try to use this as a new starting point with your mil....ask her to help out...pick up some milk on the way over, or tell her you've been dying for a nice roast...could she get you a ready meal from the shop before she comes (hint hint) she may be thrilled to be doing something useful....and at your request!
good luck with your impending arrival.....