I'll tell you what I did... I prepared a dog carrier with a smaller cardboard box as a nest. The night I moved my broody, I went to check about one hour later and she was laying outside the nest. I put her back, closed the nest with some cardboard and put some bricks behind it so she could not open - making sure it had enough ventilation. the next morning, when I went to check on her, she was sitting on the golf balls (I still didn't have the fertilized eggs).
Two nights later I put the fertilized eggs under her, again closing the nest opening with cardboard to make sure she would not leave the nest during the night. Today is day 4, and so far, she's doing a great job!