Yes, all the camping data is contained with the app. For the iOS version, except for the map, no Internet is needed. However, if you have the map cached, then you'll be able to view the map offline as well. If I'm traveling to an area with no Internet, I try and view the area on the map I'm gong to because that caches the map tiles to the device, and those cached map tiles can be used later when there's no Internet.