No, we didn't use the crowd calendar. We've gone at this time in previous years without any problems with crowds so didn't think it necessary.
I was able to give my MB to my male friend without any issues so I guess the CMs don't care who actually uses them.
When the bands are scanned, your MDE name comes up on the CM's computer screen (more often than not, your real name) not the name on the inside of the band.