There isn't a right or wrong answer here, personally, I would allow all children if I allowed any only because I am inviting these guests to join me celebrate and alot of them would probably understand if they were asked, however, how it appears from the outside looking in is just as important. Providing day care can be very costly and are you sure all the out of towners agree to have their children in day care? It may be more of an imposition to some of them. If you should decide to do the adult only, you may want to consider shortening the reception to a couple of hours which will most likely just include dinner or just refreshments. And who will be with your NEWBORN? Your little angel is already amongst you, personally, I would just make it a family affair, it may be a little harder, more expensive, but it's a once in a lifetime event, where you will be surrounded by loving family and friends. Maybe you can reconsider where your other expenses are and see if you could move somethings around, without knowing, it's hard to say..... You may want to consider appointing perhaps, some of the teenagers that will be there to oversee the rugrats! (kidding) and provide them with some activities that could be done during the reception and pay them a little something, it's a thought.....you still have a (very little time) to work out the details, maybe you can share a little more and maybe we can help.....CONGRATULATIONS! ON YOUR NEW HUBBY N BABY! HOPE YOU ALL HAVE THE LIFE DREAMS ARE MADE OF!