hand expression
Honestly...
I hate pumps. Hate them. I used hand expression (go to lalecheleague.org for instructions or call a leader) and had much more comfortable results.
I'll admit, I only needed to express just to take the edge off of engorgement, and for a couple of outings...
But if you are at home with you babe most of the time, and are going out briefly...
try nursing right before you leave and right when you return...
your babe might not need any milk in between, and might get away with just leaving a few ounces for the sitter.
Also, we used a dropper instead of a bottle (to avoid nipple confusion) and it worked great.