Fourteen days is the usual limit for staying at most public (state or national) campgrounds. However, some are more generous and allow stays up to 28 consecutive days. Frequently there is also a set time between visits for most campgrounds. While many locations have policies limiting how long you can stay, that’s not always the case. Many private campgrounds and RV parks have sites they designate for long-term stays. These can last for several months or even a year.