to the DIS..
We do bring our own, as it is allowed. We bring it on with us, in a rolling cooler. The cooler is allowed, however, only soft sided ones, and NO ice, as it must go through the Xray Screener.
Some pack it in their luggage, and that is personal. I would not feel comfortable for many reasons. If it broke, and spilled on all my clothes, or perhaps ruined someone else's, I would feel badly.
We prefer it this way. Just remember if you bring your own wine bottle to the dining rooms, they can and will charge a 15$ fee for opening it. We always try to avoid this, and do so by requesting glasses (or picking them up at any bar) and open it in our room and just bring our glasses to dinner..
Any beer we bring is in plastic or metal cans, as glass is prohibited near the pool areas..
HTH