Do you have any colleagues whose room keys you can borrow during the day - that gives you somewhere to stash the paraphenalia, a fridge, and a private place to pump. Remember that many of the men will also be dads - it's surprising how understanding they can be of this whole baby-feeding thing. If you are able to plonk what you express straight into a freezer then you don't need an esky to get it home either.

At conferences I have: pumped in the loo and just dumped it; squirted down the handbasin in the couple of minutes between talks so as not to explode mid-presentation; borrowed people's hotel rooms; used the lecture room when everyone else was at lunch; ducked into any old vacant room (and been sprung by a lady showing around a couple who were thinking of having their wedding there - oops!); and so on. You will be able to make it work.

And word up someone to snaffle you some lunch if it ends up being the only time you have for pumping.