I'm pretty sure that during the months of Oct-March, young healthy children are not allowed in certain areas of the hospital because of the flu and RSV risk. Check with your hospital policy first.
As far as whom to babysit your 13mo daughter...do you have any close friends that would be willing to watch your daughter at any time? Since you really don't know what time you will go into labor or how long you will be in labor, it might not be necessary to have your 16yr old son alone with her all night. If you really don't have anyone you trust, then maybe your husband will have to go home in the evening while you stay overnight in the hospital. Hopefully you will be feeling well enough to go home after one night and be in the comfort of your own home. Another way to not have to be worried who will babysit your daughter is to labor at home as long as possible before going into the hospital. That way, you can have your 16yr old kids take care of your little one while you labor in your own surroundings, close to the ones you love.
Whether you are in the hospital for a short time or longer than expected/wanted, do you have a strong village? Do you have people outside of your family that you can count on to help you and be there for you when needed? Even after you birth your baby you will need support and help while your husbands at work and older kids are at school or doing their own thing. It's important to your well being to have a good community of people that you trust and love.
PS. Have a family discussion about how your daughter can best be taken care of and how YOU can best be supported and taken care of so you can move through your labor with more peace and just concentrate on what you need to do. Not having to do this all on your own and letting your family take some responsibilty in the decision making will let everyone feel like they can contribute. I'm sure someone will come up with some great ideas!
Congratulations on the upcoming birth of your baby and best wishes for your journey.
A.
mom of 4. Married 15 years.
Birth and Parenting Mentor
www.birthingfromwithin.com