I agree using a non standard plug makes it hard to run power. Also while the the camera is designed for outdoor use, the instructions specifically say not to use the power supply outdoors.
This is what I did. I bought the
100ft Video & Power Extension Cable from Smart home. I then went to Radio Shack and bought a matching set of "M" size connectors. Next I cut about 6" the end off the power supply cable. Then I added "M" connectors to the cut ends. Make sure you put them on the correct ends. I then took the 6" adapter cable and plugged it in at the camera. This gave the camera and the power supply a more standard plug arrangement allowing easy connection of the combined cable. I also taped over all the connectors once they were plugged in.
Wiring with the combined pair was much easier also.
I believe Smarthome has a 60 ft cable as well for a few bucks less.
Don't feel bad about not using the 100 ft video cable that came with the camera. Any power supply arrangement with 110V extention cords would cost at least as much as the combined Video & Power cable.
100ft Video & Power Extension Cable - Item# 79935A