I do have to add, we're talking about a command element here. They're NOT just passengers. They're doing things. Talking on wireless sets, taking notes, looking at map boards, tallying various figures. You cannot do this when you're crammed on a vehicle in a set with someone else's elbow in your face.
Command sections rode around in a vehicle appropraite to their tasks OR setup a larger command post for better space and working environment.
http://www.mapleleafup.org/vehicles/.../restore3.html
http://www.goldbeach.org.uk/images/qlr.jpg
My thinking is that IF you have an HQ, you should have the appropriate vehicles and material to reflect this function. They're not just 6 guys stuck in a field somewhere in some trees twiddling their thumbs.