A dog who is still learning the perfect recall is safer to be on a leash. Even in a fenced-off territory, we recommend leaving a 5 m long leash on the dog and put in on the ground. So the dog can drag it with them. When can my dog walk without a leash?
If you will need to call the dog back to you and the dog will be distracted, you will be able to gently pull on it and encourage the dog to come. The worst lesson is when we call the dog back to us, they ignore us and we let the cue vanish in the fin air. The leash would help you to give freedom to the dog but also guarantee that the dog comes back when called. Recall is the most important skill in your friendship.