Can I leave a cake with a crumb coat only out until tomorrow evening before covering with fondant? I like to give my cakes just a thin crumb coat under my fondant, but I usually only wait a few hours for the icing to set up before covering, not almost a whole day. However, due to a busy schedule this is what I have to do ... but of course I am nervous the cakes will dry a little bit if they are left out with crumb coats only instead of full coats of icing.

What do you think?

You can. If I'm leaving mine for long periods of time before I put the fondant on, though, I stick it in the fridge. Just bring to room temp before decorating, and you may have to mist the BC to help the fondant to stick.

I've done it, just cover it well with plastic wrap. I give it 2 layers.