I'm assuming that Carson is in the Long Beach mission?
Carson has lots of Polynesians & Latinos that should be more willing to listen to your son than the whites in the area will.
Long Beach is home to Belmont Shore, one of the leading gay/Lesbian communities in southern California. Gangbangers will probably just ignore missionaries. But they are still a bit out-of-sorts about Prop 8 in Belmont Shore.
In-N-Out Burger pwns all.
Suerte y al toro.