I think it's great that you did your recall training outdoors! That's the one thing people need to do more. I have a lady who actually told me that her breeder told her that her dog can never be off leash, so she's never taken her!
Now, her dog is 2 and she affraid that she won't come back if she's set free. It's quite a pitty. Teaching a recall within a building is useless. It's also great that you trained a K-9 dog! That's really admirable. Looks like we agree on some things!