Keep in mind that with almost all airlines having 50 pounds per bag weight limits, you could go overweight VERY quickly.  A 10 pound suitacase, case of water, a few sleeves of juice boxes, and you've quickly hit 50 pounds.  
If you are coming in the summer, you should plan on 5-6 bottles of water per adult, per day to maintain proper hydration.  So a case will last an adult four, maybe five days.  In all honesty, I'd just order from Garden Grocer and be done with it. 
Anne