We are going on vacation in a month (without LO) and I want to continue nursing, so I will be pumping/dumping while I'm gone to keep up supply.

We will be in Europe, I have a converter so I can use my Medela double electric pump, and I'll bring batteries to use the pump without plugging it in - but I'm wondering if I should have a manual pump too, just in case?

Worth it? I have never used a manual pump, only my double electric. I've been pumping at work 2-3x a day for about 3 months now.