I was away from my baby for 2 nights and, even with frequent pumping (I never went more than 3 hours, even through the night) I ended up with horribly painful plugged ducts. I don't know if you're prone to those, but not being able to nurse definitely exacerbated my issues.
As for how often a 9mo nurses, my DD has nursed every 3 hours since she was born until now (she's almost a year old) -- even with solids being introduced at 6 months, her nursing never decreased in frequency, so I'd plan on having enough milk stored to feed your DD as much as you do now, just to be safe.
Congrats on the baby and the upcoming wedding! I'm sure you'll find a way to make it all work out -- having a nanny (or family member, who might do it "unpaid" except for the free vacation) travel with you would be great if you can swing it!
As for how often a 9mo nurses, my DD has nursed every 3 hours since she was born until now (she's almost a year old) -- even with solids being introduced at 6 months, her nursing never decreased in frequency, so I'd plan on having enough milk stored to feed your DD as much as you do now, just to be safe.
Congrats on the baby and the upcoming wedding! I'm sure you'll find a way to make it all work out -- having a nanny (or family member, who might do it "unpaid" except for the free vacation) travel with you would be great if you can swing it!