Maintaining your camper will prove useful in the years to come. Regular inspection of the working parts will prevent any nasty suprises from occuring when you are on your travels. Because most folding campers have a fabric roof and side walls, they are susceptible to damage from bad weather conditions. It is important to look after the fabric and treat it with respect and care. Modern fabric materials are very good at keeping water out, and the fibres inside the fabric are very tough and strong.
However, an older folding camper trailer may not have this kind of technology, and so will need more attention. Cleaning down after use and allowing the material to dry out properly is the best way to prolong their shelf life. Checking for tears and holes regularly should also be on your maintenance schedule.