to share, or not to share...that is the question

As my due date looms closer (ok, I still have 15+ weeks, God willing!) I have MANY thoughts racing thru my head. I've gotten a few items taken care of: borrowing a 2nd pack n play, got the 1st one replaced (recalled), got a double stroller (I <3 you Heff!), and have been promised some $ towards our convertible crib. As I was cleaning Moo's room today I was looking at the cute nursery decor and wondered if I should leave her room the nursery and let her have the guest room to herself? I was planning on having the girls share a room (baby will be with us in a bassinet for the first few months), but now I'm wondering if that's what I should do? We do have guests come visit us in our tropical location many times thruout the year. Should the girls share the larger room and convert the "nursery" into the guestroom? Should they have separate rooms?
Discuss....(P-L-E-A-S-E!!!)