Yes, she may not want to BF again when you get back, that is a risk I guess? But she may also just pick-up right where she left off and you'll have no problem at all. I guess you won't know until you actually do it.

Yes, expressing while you are away (as often as you can) will be essential to maintain your supply. What a shame you will have to dump all that precious liquid gold.

Will you express before you go to build up a supply of frozen EMB for her? Or will you just give her cows milk or formula or just water? Also, try to get your DH to give EBM/ABM to her from a cup rather than a bottle.

I think you really need to think about being away for a week (5 - 7 days). 3 - 5 days just doesn't seem realistic to me. You will be traveling for AT LEAST two of those days and you will need to sleep at some stage.

WOW! Good luck darling! What a decision, what an adventure.