When you book make sure you specify that you want to bring a pet as some owners with multiple lodges have some designated as pet free. General park rules for pet friendly holidays are pretty much common sense. Dogs are to be kept on a lead and you need to clear up after them. Many parks will have special designated dog walking areas so that you have the opportunity to walk your dog and let him have a run around.
The lodge owner may ask that your dog is kept out of the bedrooms but you can always check the specific rules when you make your booking.