Not letting a working dog inside is a fallacy. My dog is an inside dog, well socialized and still has the most prey drive I've ever seen (30+ years around bird dogs) to point of nearly being called psychotic. It also makes her very stubborn. She'll latch on to a scent and won't let go. Both good and bad. The good is she will track a running bird long distances, the bad, she'll go over scent where a bird has been over and over again.
My dog also knows when we are seriously hunting or when 'play hunting'. One of her favorite things to do is 'hunt' shorebirds. They run, fly low, and circle around. On hunting breaks, I let her go after them. After the break, we'll go back to real birds and she'll will ignore the shorebirds. After the hunt, I'll let her play again.