Yep! Campers come in handy for lots of things at home. Glad you were able make this work for you.
We usually travel with all our tanks empty. But this last Summer we started keeping water in the fresh water tank, even at home. Glad we did on two occasions. One time the power went out, and our house is all electric, on a well, and septic tank. We were still able to use the camper for bathroom and taking showers.
Another time (last Summer), the sewer lines in the house caused everything to back up, and toilets quit flushing, and water overspilled the shower in the lower part of the house and flooded (bathwater from the upper level).
Turned out, the septic tank needed pumped. But until then, we were able to use the trailer bathroom, and life just went along happily!
Having access to the camper at home is priceless! It is a GREAT secondary emergency tool for sure!