I have a family of 8 6 kids myself and wife are TT sleeps 9 comfortably but I noticed allot of the camp grounds state 6 max per site what do large family's do ?
Many of the places we've stayed have a limit, but it's on Adults in the site. Sounds like your family is spread over the years, so probably not an issue. Again as many have said, call! The worst they can say is "no"