Of course, telling the officer you have a CCW and a firearm FIRST when he comes up to the door, instead of waiting until during or after the traffic stop coversation is in your best interest too..
I guess the point he made clear is to be proactively very respectful, courteous and informative to the officer (even if he's a jerk) just to keep yourself out of inadvertant or accidental trouble due to a "honest" mistake.
My $.02
While in Texas, we had to present CHL and inform status (ie carrying or not)... there is no such requirement in Indiana. Sure, I will agree with you, it is polite to provide the identification and say you are or arnt; however, I don't think there is anything of a mistake by not. You have a right to say nothing at all, if you so choose. If its not germane, I don't think I would bother informing. I don't care to add anything else to his mind than whatever it was he is stopping me for in the first place. Maybe there is a manhunt going on for a man with a gun, and hey, I've got a gun, could I be the man they are looking for? ... I do believe there is case law that if you have presented your valid LTCH (normal stop -> buldge -> gun? -> ltch was okay -> searched anyway and found drugs... thrown out for no pc for doing the search etc), then they don't even have any reason to go any further with that line of thinking.
Now by no means say "No I don't have a gun" when you do. That would be an issue.