There is very little maintenance that needs to be done! The water heater recommends to replace the anode rod every year. Dexter Axle recommends that the wheel bearings be inspected and repacked every year or 12,000 miles on the axle. The exterior caulking on the trailer should be inspected at least once a year for any voids, shrinkage, or cracking and touch up those areas if any issues are found. The tires should be inspected at least once a year for any signs of wear or damage and replaced, if necessary, as with any vehicle. If the camper is in an area of the country that sees freezing temperatures, the water system of the trailer should be winterized and you should remove the trailer battery and store it inside someplace climate controlled at room temperature.