Why not shower your guests with care and provide them with anything they could possibly need? That's just what we did, after a quick trip to the drug store and dollar store. We loaded up baskets of supplies for the restrooms (very gender specific) and let people go to town. I heard a line formed at one point because some of the youngsters wanted to try a sampling of the offerings. Anyway, it didn't cost much, but a little touch like this hopefully showed our guests we care.