The only place of any consequence that could even bother to care about this is SLC, and they barely have any int'l flights anyway. 5 bottles will still always be considered personal use. Generally speaking they couldn;t care less if you have 2 bottles, unless they really want to give you a hard time. Also in my experience if they are busy they will not generally bother to charge on wine under six bottles as it just isn;t worth it. They will be a bit more vigilant about harder stuff, so just declare it and pay the $20 or so and be done with it.