Since The King has shared his invention idea, here's mine:

Scouting Robot: A small, 4-wheeled scouting robot powered by rechargeable batteries.

Features:
Video/cell phone link back to owner's computer to allow remote driving for re-position
Silent electric motor
Embedded GPS
Digital still/motion camera
Remote re-charging station (possibly powered by propane generator or extension cord)
A small dump trailer or bed for bait
Noisemaker for calling
Scent dispenser

Cost would not be much greater than a good-sized stack of scouting camera's and the robot would offer unlimited flexibility. Imagine the possibilities!

Here's a two wheeled version that can be thrown into hostile areas. Droptine probably has a few in his kitchen.