a packed case of wine weighs in at about 50 lbs. check shipping on 50lbs.
the wine will go through temperature hell(both high and low) on the shipment. many wines do not hold up well through those changes.

using bubble wrap or mache separaters and laundry are as good as anything i have found. we have a couple old samsonite indestructables and put 11 bottles in each case(under 50 lbs), and shipping them as luggage on the plane the best way to go. i have been in and out of iad a number of times, and they do not trouble themselves with collecting duty on wine. they have never enforced VA laws on me. are they even on VA land? i do realize they collect VA sales tax at IAD stores and restaurants.