You propably want some form of customized joystick, you can get joysticks with 4 axis per stick, then you can control the entire camera with your right hand and then drive with your left.

Two radios is an option (if you want 2 peole to drive it), but in that case I thint it would be cheaper to extend some of the channels with a cable to the second person. That is, if you are satisfied with 7 channels (max if you do not look at extreme things).