[team222badbrad]

Car like steering = Hard to maneuver!

I would go with 4 wheel drive.

A steering robot is like driving a car in a crowded parking lot... Except you do not have to stop to shift into reverse!

Instead of 4wd you could have a 4 wheel drive to 2 wheel drive conversion by simply lowering casters that pick up the 2 front or 2 back wheels.

We have done this the past 2 years and we have used both Pneumatics and a Globe motor.