State Emergency Service Drones (UGV) - some cool concepts here: adjustable height, multi-level run-flat tires, brush guards, sensor array, structural detailing, storage... well thought out.
leoweick Maybe use the "SSC-32 Servo Controller" or "Mega IO Expansion Shield for Arduino Mega + Servo driver" open source code with some changes to adapt a CCD camera for FPV + ultrasonic sensor
Arduino 101: Potentiometers and Servos
2007 LEXUS IS250 AC AIR CONDITION SERVO CONTROL MOTOR 063800-0171 OEM 880 #57
Building a Trinket-based (ATtiny 85) rover | Bits & Pieces from the Embedded Design World