You have a duty to inform if an officer identifies themselves by law enforcement AND asks for ID.
You can carry in establishments that serve alcohol, but you can not drink in them while you are carrying.
There is no law stopping you from throwing your carry piece in your glove box, go in and get a drink, and then when you leave putting your gun back on. If you are involved in a shooting, your BAC level may be taken and by law can be factored in to the investigation, however.
You can't carry in state & federal buildings, polling places, schools, churches.. blah blah blah. Rest stops are excluded by law from this restriction.
No Concealed Carry signs do carry the weight of law here, but they have to be the exact size, form, and placement on the building an every entrance as prescribed by law, otherwise they do not carry the weight of law.
With a CWP you can carry in any open or closed compartment in your vehicle, without a CWP you can only carry in closed compartments such as glove, trunk, etc..
You need express consent from a homeowner or lessee to carry into someone's home, this does not apply to public businesses.