The only thing I don't like about using a vet boarding facility is there is NO one on the grounds at night. If a disaster occurs such as fire or storm your dogs are on their own and it never ends well for them.
A private kennel where the owners 'live' on the same grounds is a safer place to board.
Ditto on call a local breeder rescue in the area you are going to camp at. They most likely will have a pet sitter they can refer you to. IMHO I would most certainly NOT rely on any reviews of a kennel on line.
Ask the owner of the CG you are going to stay at who they would recommend. :C