You know, buddy, of all the nights I've spent Bass fishing on Taylorsville ... I don't really remember seeing very many people out there night fishing for Crappie. Now, that's been a LONG time ago, and I'm sure there's ... well, I KNOW there's a whole lot more people Crappie fishing that lake than there was back then. And I have seen quite a few boats, rigged for Crappie fishing, launching in the late afternoon, while I'm loading up to head home ... so, yeah, I'm pretty sure there are night Crappie anglers out there, nowadays.
I don't see why you wouldn't catch just as many at night, as in the day, and you sure wouldn't have near the boat traffic to contend with as you do during the day.