Remote surveillance camera?

Ok being a bit of a tech nerd I came up with a project for the larger airsoft games, such as Berget and Border Wars.

A remote controlled video surveillance camera, that has enough battery power to last up to approx 3 days that can be accessed from any IP/web enabled device on the battlefield.

The concept would be that a sniper/someone who can stalk would sneak up to a key intel point such as the enemy base or a target that is going to be assaulted, the camera would be placed in a good overwatch position and then anyone can view the feed from a laptop back in base or an iPhone/Android Phone while in the field.

Basically from you guys, I want some feedback, good idea bad idea? Ideas? Things that would be useful to have integrated, things I may be missing. Just general info before I set off building this.