Ok, I get it now. Just a few tidbits about my install.
My solar panel is soon to be secured with tamper proof nuts and JB welded screw heads, making theft very unlikely. There is insurance for that though, not worth stressing about. However, I live in my van, so circumstances are different.
My solar panel sits roughly 1-1.5" off my van's roof. It actually acts like a shade and keeps my vans interior a few degrees cooler.
I have a problem with clearance. My roof vent makes my van 6 feet 5 inches. There are just some structures I cannot clear. But my panel sits below the vent, so it's not a additional problem worrying about the panel catching.
I too decided to flat mount my panel, but my roof doesn't pop up. You could get a rail system and tilt legs for this if you ever decided to go the roof mount way.
With that said. They make pole mounting systems for solar panels. I have seen them on solarblvd.com, as well as other places.
Also, the same film they use on helicopter blades can be applied to the glass on solar panels to protect them from hail and crap without affect amperage.
I do not know how the interior of your van works, or else I would suggest some options for storing the panel.
Good luck!