Re: Building supply
Most women find that the best way to start a stash of milk is to pump after the first morning feeding. Milk production tends to peak overnight, so most women notice some extra milk first thing in the morning. Aim to pump consistently- i.e. same time of day, every day- because that will build supply far better than a random pumping session. If pumping after the first morning feeding isn't filling your freezer fast enough, try adding a second session.
Since your trial run is so short and coming so soon, you probably don't need to introduce the bottle before you go. But it wouldn't hurt to try, if you have the time and energy.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"