A 22-250 should do it. I also worry about mobs like BLM or Bernie supporters shutting down a highway. My pick is an AK with a bunch of loaded mags. It is illegal here in Colorado to carry a loaded rifle in a vehicle so I have the AK unloaded and the mags in a cloth shopping bag.
Is it illegal to have it loaded, or to have it chambered?
And, by the way, awesome pics!
EP