Very easy with iExplorer:
http://lifehacker.com/5891964/can-i-transfer-app-data-and-game-saves-from-my-iphone-to-a-new-ipad
Just copy the Documents/keeper.sql file to the new device.
Might not work so well if the app versions are different...but this worked for me...
Saved me alot of time.
This is also a cheap and easy way to backup your vault and maintain encryption.
-Matt