I would have my repeater self ID; just to make sure the FCC Nazi's don't fine or imprison you if you get on their bad side and someone chooses or forgets to ID themselves. Play it safe, IDers can be purchased for less than $100. Or if you're capable, build your own for less than $10.
Here's an example, https://bandingsite.wordpress.com/arduino-ider/. I built one for my RT97S using a NodeMCU, a protoboard, a couple each resistors, capacitors and transistors, and a DB9 connector. Not beautiful, but it was a fun project.