The "bumps" in 2010 should have served as a good testing ground. Machines like ours
http://www.chiefdelphi.com/media/photos/35517 could almost "get air" off the 18" bumps, resulting in impacts similar to a 6" drop.
We did this repeatedly, in competition and testing, to the point where we broke the spokes on one of the AM wheels.
The electronics board was supported by an inch of closed cell foam, and the battery was surrounded by an inch of foam as well.
All of our electrical systems still function just fine... the robot has actually been lent out to a school planning to start a new FRC team so they can get some practice in.
Jason