Am looking at purchasing a used 2007 Rockwood HW276. The unit has a water heater....but I'm embarrassed to say, I don't know if it has a water tank to use when I'm not hooked up to city water. Does anyone know?
My 1988 Coleman Sequoia had a tank. Every modern popup I've ever seen, if it has a sink, has a fresh water tank. Given your HW276 has a hot water heater, I'm sure it has a tank.