Seeking Advice:: Baby Shower Drama

My two sisters and my husband's two sisters are throwing us a baby shower. I find myself and my husband are in the middle of the drama. No one can agree on anything. My husband is upset with my sisters and I know the frustrations of dealing with my sisters-in-law. I am to the point where I am not even looking forward to it. 
I don't like things to come between my husband and I, but I don't know how to remain neutral. Any advice is greatly appreciated!