Although it is good programming practice, you do not need to use the watchdog.
You can easily turn it off by setting the SetSafetyEnabled in your RobotDrive object to false.
This applies to both auton and teleop.
Code:
#include "WPILib.h"
class BuiltinDefaultCode : public IterativeRobot
{
private:
//Declare drive motors
Talon* m_lDrive;
Talon* m_rDrive;
RobotDrive* m_robotDrive;
public:
BuiltinDefaultCode() {
//Initialze drive controllers
m_lDrive = new Talon (1);
m_rDrive = new Talon (2);
//Initialize robot drive
m_robotDrive = new RobotDrive (m_lDrive, m_rDrive);
m_robotDrive->SetSafetyEnabled(false);
....