Thanks for the feedback! I was planning on mounting it just behind my bus gas tank. As far as "dork-proofing", I've found that every time something has been "dork-proofed", the world comes out with a better dork!
Around here, the only 1/2 way safe place to mount it is on the roof & then I'd have someone drive off an overpass!
Anyway, I can't really afford even a used cage for it, (I also haven't been able to find a bus boneyard near my area) that's kinda why I was wondering if I could do it w/out breaking any regs, or failing a vehicle inspection. I guess all I can do is mount it, the worst that can happen is to have to take it back off. Thanks again for the input!