I left my 5 month old baby with her dad (long time agoo) for 8 days because of a holiday I had agreed to go on with my 78 year old gran.
It was breaking my heart. I had really pumped and frozen over a gallon of breast milk! But I didn't want to leave her.
I went. I tolerated the holiday but my gran adored it and we spent each evening eating together and she told me loads of wonderful stories about my Granpa and her it was like seeing him again (he died when I was 16).
I pumped 6x a day (but had to discard the milk!!) and when I got back dd latched on like I'd never been away! It took about a week for my supply to re-establish properly but we went on to feed for another 7-8 months.
At he time I felt like a really bad mum to leave her. But .. I now can communicate to her, and her younger brother and sister, loads about their lives, because I got it all from her.
She died in early 2008. The holiday we'd been on was to southern Germany to see the famous Oberammegau passion play. It's only performed every 10 years, and I promised her we'd go again. But she died before we could. She didn't know I'd booked the tickets.
We named our dd2 after her, and her paternal grandma.
I've never regrettd this holiday, but it was very special circumstances, and my 5 mo didn't suffer.