Forget the air pump. If you bag the coral and fish with plenty of air in the bag and also consider that they'll probably be in there for about 3 hours total (you've got to break down and setup and let the tank clear a little bit), then you'll be fine. I've moved my 30 gal. back from dorm to home twice. I've found the best method for me was this; hope it helps.
1. Have 3 5 gal. buckets with lids.
2. Fill the first with water and all rock w/o corals. (be sure to place the corals on the bottom of the tank)
3. Take out as much water (in second bucket and/or third bucket) as you can w/o exposing the corals/ fish or any other inverts.
4. Bag all fish/inverts and any corals that can fit in a bag. (If you have a coral that can't fit in a bag, you can buy a clear plastic box with a lid (should sell at LFS)). Place all bagged/boxed goodies in second and third buckets.
5. Put the rest of the water left in the tank ( leave enough to cover sand).
6. Once home get as much water in the tank setup ALL filtration to clarify the water a bit. Get the temperature rolling. Leave lights off. (If fish are stressed IME they do better in darker environments). Once the water temp is within range and water is pretty clear, place corals and fish back in with rocks.
7. A tip I've read is to place a trash bag over sand when you pour the water back in to keep the sand from being stirred around too much. Once half of the waters in, gently take the bag out.
Wow, that's a bit of typing; hope that helps! Keep your wits about you; you'll be fine.
