I'd take an online survey.
If you have a strong stomach, you might find some "non-gun owners" (I can't believe I'm writing this) at the democratic underground website.
The FDLE and Texas' DPS have publicly stated that CHL gunowners have the lowest arrest rate in either Florida or Texas, FWIW. I'd bet that's universally true, nationwide.
In the same vein, I remembers seeing some stats which indicated that arrest rates among CHL holders were comparable to or even
lower than the arrest rates among the members of some big-city police forces. (pre-Katrina NOLA PD was one example given.)