Pixhawk seems to much controller for what you need. But it would allow programming to route with auto mission.
I used a Parallax chip call a Propeller and two XBee 2.4g modules and built my own code.
Using a single joy stick and an H-Bridge in a Tank I was able to get it to go forward and backwards and even do a 360 on dime.
checkout this link: parallax.com/product/32500
Mike