Okay here are the issues you are facing.
Your distance is to long for usb (maximum run on usb without amps is 15 feet)
You will need to either have power at the camera location (not likely)
or carry power along with the cable to the camera.
You can use something like Amazon.com DLINK Camera
However you will need to use this item with the camera:POE adapter
You want to also make sure you have a weatherproof enclosure.
Also make sure the cat 5 cable is rater for outdoor use preferable direct burial. It costs a little more but it won't degrade like indoor cat 5 cable. Using indoor cat 5 cable outside will deteriorate over time.