Dismount = leaving vehicle. Do you perhaps mean disarm?
Most important aspect here is to learn to research, especially the basics, so that you have 1st hand knowledge of the laws. Presume that you are of an age and experience level consistent with legally carrying a firearm.
RV/Car Carry Without A Permit/License
527.020 Carrying Concealed Deadly Weapon.
(8) A loaded or unloaded firearm or other deadly weapon shall not be deemed concealed on or about the person if it is located in any enclosed container, compartment, or storage space [regularly] installed as original equipment in a motor vehicle by its manufacturer, including but not limited to a glove compartment, center console, or seat pocket, regardless of whether said enclosed container, storage space, or compartment is locked, unlocked, or does not have a locking mechanism. No person or organization, public or private, shall prohibit a person from keeping a loaded or unloaded firearm or
ammunition, or both, or other deadly weapon in a vehicle in accordance with the provisions of this subsection. Any attempt by a person or organization, public or private, to violate the provisions of this subsection may be the subject of an action for appropriate relief or for damages in a Circuit Court or District Court of competent jurisdiction. This subsection shall not apply to any person prohibited from possessing a firearm pursuant to KRS 527.040.
Follow the links for your state on these interactive maps - they are a great primer for getting started and will answer many of your questions.
http://www.opencarry.org/maps.html