Not that I'm real big on suggesting Thousand Trail membership Park's but most on them fit the bill as to RV sites, cabin's and tent sites. Even though I'm a member, I'm not sure if every TT Park is open to the public but Lake of the Springs is one park that comes to mind and there are a number of locations up SF way. Good Luck and have a Great reunion!!
96 Vogue Prima Vista
The Kid's: Humphrie, the Mini Schnauzer and Georgie,wire haired dachshund.
Rainbow Bridge: Laddie,Scoutie,Katie,Cooper,Kodie,Rubie,Maggie, Cassie, Mollie, Elvis, Potter and Rosie Love You! (40+ years in all)