Well, notwithstanding the fact that your opponent has no reason to look at your side board, I think you may have to HIP the guys under the concealment counter. For that matter, you can usually get by w/o the cloaking display completely since you can just HIP everything except the ? counter that you're walking around. I must confess I've never used it even in night games but I'm pretty sure it doesn't have any special code to do anything other than what the regular board map does.