Ok, thank you for your input. I was thinking I might be headed for trouble.
I think in the masterbedroom bath I'll just put floor to ceiling 1x4 shelves on the partition wall between the door and the toliet. It has a 4 inch clearance for depth, is 15 inches long for length of shelves. That gives me lots of space for all the things that are currently cluttering up the counter space. Then the alcove on the otherside I can put in shelves over the toliet for bathroom linens. That bathroom is so poorly designed it's incredible. But it would cost more than the entire trailer to remodel it so I'm sticking with what I have. The one thing I love about it is the garden tub.