I have always noticed a smell in our camper after traveling or when parked in driveway with the slides in. Today after setting up ladder to check roof I think I figured it out, it is the roof of the s...
I vote for being more aggressive with deodorizing the black water tank (bleach, detergent, ice chips - then drive around with almost full tank - then lots of water flushing). Is the seal in the toilet working properly and are you leaving some water in the toilet as an odor trap? I do not think the roof would smell that noticeably.