[tor-relays] How can I tell if my bridge is working?

[Steve Snyder]

New operator of a Tor bridge here.  How can I tell that it is being used?

With a regular relay I can look up the stats on TorStatus, or I can see 
that there are n current connections.  But a bridge won't be published, 
and the lower volume of traffic means that there may not be many active 
connections at any given time.

So how do I know if it is working?  I mean beyond the absence of any 
errors logged?

Thanks.