Jacksonville FL, Where!!!

Going down in the next 6 weeks, where is a nice campground. (ocean front is a ++) Last trip ended up at Hanna park and said never again. Have been told to go down to St Augustine, but again where?
40ft Fifth wheel with 4 slides, 1 ton full size truck, I'm 65 ft long. two dogs, Need F/H w/50amp. Need local eyes!!