I agree with the others that you might want to rethink the laminate in your main bathroom. Are you speaking about a half bath, or a full bath with tub/shower?
We have laminate on our entire 1st floor, including the 1/2 bath. I am not very worried about the laminate in there right now. Now, when my son starts clogging up the toilet as he gets older, we might have an issue!
I definitely would not put laminate in a bathroom that has bath/shower. Ceramic tile would be best.
Do you have an entryway, or perhaps a small sunroom where the laminate could go instead?