Doesn't sound like you have anything to worry about. You know the places that are not allowed.
Main difference here is that there is no permit needed for OC. The only time you need a permit is if you choose to CC. CO recognizes your permit so you can CC here too. Only places to worry about are places that post no firearms. Signs have not force of law, but you don't want to be hit with trespassing.
CO is also a shall issue state. But we are not a "must inform" state. So you have no duty to inform an officer if you are armed. But you know, be nice. Honestly, you should be fine.
Remember in CO, your vehicle is treated like your house. You can OC, CC, whatever to your hearts content. It's your "home". Only thing is, you cannot carry a chambered round in a shotgun or a rifle. Handgun carry as you wish.