We've dealt with baby bunnies in our yard several years ago. The way the Mama rabbit takes care of them is hiding them pretty much in plain sight. They have no odor, and the Mama only nurses them 2-3 times a day. She stays far enough away, but close enough to draw any attention away from the nest on her. The bunnies are old enough and have the instincts to leave the nest at around 3 weeks of age.
I can't wait to share pictures!!!