Recreation Vehicle Safety and Education Foundation provides safety training and RV Weighing for the RV Industry and Consumers.
Good Sam Club - RV Net forums - Camping forums with many different topics including all styles of recreational vehicles, technology, family camping, full time camping, camping locations, etc.
Forest River Owners Forum - Owners of all Forest River RV Products talk about issues, challenges, and other aspects of thier campers. Sections are available for general RV topics as well as specific brand details.
Forest River Owners' Group - Link to the Forest River Owners' Group that has different camping rallies around the country.
Facebook - Well if you are a member of Facebook there are a ton of RV and Camping groups and pages. While it is impossible to list them all there are a few that we are aware of:
Good Sam Club - RV Camping Club since 1966 provides campers with discounts, services, and camping rallies around the country. While the large "corporation" Good Sam club is all about the commercialization, the local state and chapter organizations are all about camping with family and friends and supporting community efforts such as raising money for the dogs for the deaf, and other efforts.
Pete's RV Youtube - Provides a bunch of how-to videos and videos of their rigs.