When we have gathering at my house, I just let Magnus/Zoey loose. Magnus is big enough where I don't have to worry about but with Zoey, I do tend to carry her around if it seems too crowded. I can't put them in another room or gated room where they can see b/c they'll bark their heads off...
Have you tried this site:
Dog Boarding Just Got Awesome! | DogVacay
Maybe you can find a good pet sitter that can look after your baby for few hours?