Bathrooms in corporate-owned establishments because there's no sense imposing unnecessary costs on independent shops whom cannot best afford it. Plan your day, schedule your meals and surprises are reduced. And for emergency or actual camping use only, I also have a compact, compostable toilet with the disposable bags (it's just a frame and disposable bags).

On a slightly different subject, I suggest anyone considering living a habitable vehicle not use on-board plumbing or sewage systems because they're messy, time-consuming and expensive to maintain. The vehicle I use only has a water tank but I still use water-store RO water in a washable refrigerator bottle. Using a tank and sink system requires flushing and sterilization periodically, and is often awkward to fill sanitarily.