GM I want to use my webcam in a remote location... approx 50-60 ft from my computer...

If I use a USB extension cable, do I need a USB adapter or USB power booster?

This is about $30.00, and is good to about 150 feet:
Sabrent USB-RJXT USB Over Cat5e or Cat6 Extender Adapter - Up To 150-Foot, Cat5Cat5eCat6 Compatible at TigerDirect.com (http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3246389&CatId=444)

There are also wireless webcams.