You'll need:

1,000-gallon tank per hippo

1,000 gallons of water

Crane

1-pound sedative

Soothing hippo music

2 Aspirin (for you)

How to pack:
1. Fill your tank with 800 gallons of water. Start yesterday. Remember, a medium-sized hippo takes up at least 200 gallons. (Just out of curiosity, why do you have a hippo, anyway?)
2. Apply sedative. Take two Aspirin.
3. Hold it, hold it - put the hippo in the tank, first. Start with soothing hippo music, followed by a large winch and crane.
4. Now go relax in a hot bath before the forklift arrives.