Expert Advice from wedding guru, Sharon Naylor

Answer:

This is a tough situation for any bride to be in. But here's something you can tell your guests: a big new trend is for guests to bring along a relative or their own babysitter who will watch the child(ren) while the parents are at the wedding. Since it's a destination wedding, there will be plenty of time for the parents to have their kids at the hotel and do things outside of the hours of the wedding. Many wedding guests turn this getaway into a family vacation, and they find a way to have their own, trusted relative with their kids. They will probably feel better about that than leaving their kids with stranger-babysitters at the wedding's locale. Plus, kids feel more comfortable with a relative or family friend. I'm hearing from more guests that they bring their own best friend along, and during the wedding weekend, they go off to have a spa treatment or some girl time.
And of course, guests can always accept that you don't have the space nor the budget to include children, so they'll have to leave the kids at home with relatives and enjoy a couple's getaway on their own.
See if these options work for your crowd...and if anyone presses you to pay, just tell them, "Sorry I can't make an exception, or many guests will be angry." They might remain mad, they might say they're not coming, but you have to stand your ground.
I know this is a tough situation, and I'm sorry you're having to face it right now.