I would say that you do not need the extra stress of trying to feed on the move. Be selfish on the behalf of there granchild and tell them they will need to stop so you can feed. It is unfair to expect you LO to have to rush or be swpet under the carpet. I agree with Laura though that an extra BF would probably tide your LO over when you are at the early stages, but still not fair to expect you to do this on the move!! Hope you have a nice holiday, wihtout too much stress, I wouldn't go away with my MIL for love nor money!!