Assertion: campground's site | /r/HasProperty | reserved
Facets:
Source sentences:
text: When all other sites have been reserved/rented, the accessible sites then become available on a "first-come/first-served" basis.
text: Sites can be reserved up to 6 months in advance.
text: These sites must be reserved at least two weeks in advance through Recreation.gov or calling 1-877-444-6777 , and can be reserved up to twelve months in advance.