RFID object proximity detector

I am new to RFID and therefore have no idea what I'm talking about, but here's my idea: I would like to have active rfid tags that I can stick to pretty much any object I want to keep track of, my cup at a party for example, and then have a tracker that once I am in range of the object it would tell me how far away I was or at the very least tell me if I was facing the correct direction, ( a light turns on if you are going the right direction off if wrong, for example) does anyone know how this might be done?
P.S. The system would have to be mobile and preferably no larger than a remote control