This inspection camera could be useful for both big and small projects. No need to look for a power outlet, since it runs on batteries. Just get at it!
From Amazon
Extech BR250 Video Borescope/Wireless Inspection Camera
Acme Tools
Extech Video Borescope/Wireless Inspection Camera
Conrad Electronic
Extech BR250 Inspection camera Probe diameter: 9 mm Probe length: 1 m