A night drop is not recommended so it's all a matter of preference. I don't night drop mine and I know other people that don't as well.

In my rack for instance most of my BP's will bonce around the tub to regulate properly, and my Lemonblast I always see on the hot side but my Spider which is one rack slot below her always stays on the cool side. This isn't to say he doesn't make the trip to the hot side but I don't recall ever catching him there. Though I may readjust him to the top slot because it's a bit cooler there versus my bottom slots(racks can be annoying). This will be just purely for my comfort to see if he goes to the hot side at all or if I catch him there rather.