As an OA Advisor, I just want to say that anyone wanting to have anything to do with the OA needs to learn about it from their local lodge/chapter. One of the things I'm starting in my own area is an informational briefing at our SM Specific Training events. It's not in the syllabus, but a voluntary extra session.
Troops can have callouts at out-of-council camps, but only after their lodge approves it and relays that approval to the camp. As another posting mentioned, they can only receive the ordeal at their own council/lodge setting.
On another note, reading the post from ASM1,