Intriguing proposal though. Which states are a no go for out-of-staters even with a permit?
MD for one. Stories written about even active cops getting the crap for carrying through MD.. Please, I'm not gonna cite, but ready about the one on here..
Shall Issue to Residents Only:
Alabama, Alaska, Arkansas, Colorado, Georgia, Guam, Kansas, Kentucky, Louisiana, Michigan, Mississippi, Missouri, Montana, Nebraska, New Mexico, North Carolina, Ohio, Oklahoma, South Dakota, Tennessee, Vermont, West Virginia, Wisconsin, Wyoming
Shall Issue to Residents and Non-Residents:
Arizona, Florida, Idaho, Illinois, Indiana, Iowa, Maine, Minnesota, Nevada, New Hampshire, North Dakota, Oregon, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, Texas, Utah, Virginia, Washington
May Issue to Residents Only:
California, Delaware, Hawaii, New York City, Virgin Islands
May Issue to Residents and Non-Residents:
Connecticut, Maryland, Massachusetts, New Jersey, New York
In total, you will need 13 permits in order to be able to carry in all but California and Hawaii: Resident permit from CO, non resident permits from WA, OR, NV, IL, NY, ME, SC, MA, NJ, MD, CT, and RI.
http://www.usacarry.com/concealed_carry_permit_reciprocity_maps.html