Firstly, congrats on your BFP Melody! great news!

I can't say I've travelled with a young baby so I really can't give you advise on that, however it's still pretty early in the piece. I imagine by then you will have got the knack of BFing, or FF if that's what you choose/end up doing. You will however be feeding probably 2 or 3 times overnight so if you are staying in a small apartment it will be pretty confined and cosy for all. I imagine you will still be fairly tired as you will probably still be taking around 45-60mins per feed at each feed time, even overnight.

Having said that, people do, and have travelled with little babies. They are still sleeping quite a lot during 'a day' so the flight wouldn't be too bad. You can get a bassinet seat so that bubs has somewhere comfortable and safe to be inflight.

As for telling people earlier than you had planned to... yes I guess they 'may' be taking this issue 'out of your control' but by telling them now, puts the trip more in 'your control' by being able to negotiate dates with your FIL.

Good luck on your decision making and congrats again.