Hot Springs National Park firearms policy:
As of February 22, 2010, a new federal law allows people who can legally possess firearms under applicable federal, state, and local laws, to legally possess firearms in this park.
It is the responsibility of visitors to understand and comply with all applicable state, local, and federal firearms laws before entering this park. As a starting point, please visit our at: http://www.asp.state.ar.us/divisions/rs/rs_chl_law.html#law.
Federal law also prohibits firearms in certain facilities in this park; those places are marked with signs at all public entrances.
Look at this list of regulations specific to Hot Springs National Park:
Superintendent's Compendium (.pdf)
You will need Adobe Acrobat Reader to read this. You can download it free of charge at the Adobe website.