I know how you feel about leaving your babies at home. We go to WDW every year and the first year leaving Daisy I was sooooo nervous and upset. I wanted to come home to her. We were lucky enough to have a family member stay at our home. She spoiled Daisy and sent Pix messages of her. I would also call every day to check on her. I still do not like leaving her but I know she is in good hands. Maybe you can find a family member to help out?
If not, WDW doesn't allow pets in the resort rooms but they do have kennels at different areas. Some are just daytime kennels but I believe there are a few that are for overnight boarding as well. Here is a link that contains pricing, pics & phone numbers:
http://www.allears.net/tp/kennels.htm
Go on the vacation with your family and enjoy yourself. Children grow up so fast and this is a wonderful memory you and your children can make.