The pickup camper served us well for many years, but for quite some time Dad had a hankering to buy a fifth wheel trailer. In 1976 that dream became a reality. If I thought that the old camper was fascinating with its tiny appliances, this yacht on wheels had a full bathroom with a shower. It even had an oven, which I don't recall we ever baked in. We used it mostly for storage.
Several weeks after returning from one trip with the fifth wheel, Mom was looking for one of her cake pans. It dawned on her that she had left it in the trailer in the oven while we were traveling. Ever the helpful daughter, I scampered out to the camper to retrieve it. Well, not only had Mom forgotten the cake pan in the oven, she had forgotten that there was still rhubarb cake in it. Ooh, it had gotten just a little bit moldy. Not only was it moldy, but the acid from the rhubarb had actually eaten holes in the metal cake pan.
I kid you not. I'm thinking if rhubarb eats up metal, what does it do to your innards? But it seems to me it does have laxative properties, so that probably is not a problem.