Hello! Would a 12 person tent fit in a spot within the Laverne campground? Asking for a friend. 
Depends on when you get there. The later you get there the less space there may be. Most likely, on the field.
We got in there on the late side last year but were able to squeeze in with our REI Kingdom 8 + garage. So probably similar overall size. But we were stuck next to the dumpsters which wasn’t ideal.