I think in a survival situation any clothing style has its advantages or disadvantages.
Military clothing may look to police,or sheeple like trouble but "Crazy rambo guy" may not be high on a thugs "to rob" list, If you find yourself having to evade others cammo may be of aid.
Civillian looking gear, may not be a redflag at police checkpoints but it may look like easy prey to criminal minded folks, especially if its expensive looking gear.
In my case I have another dilema, If I wear clothing that denotes me as a Responder, I may have a leg up at check points, shelters, hospitals, or other environs where I may have an "in". but on the other hand I may be a target, for those seeking drugs, or someone who is pissed about not being rescued quickly enough( it happened in Katrina).
In the end I figure your actions will speak louder than your clothing in a SHTF situation. Again drawing from Katrina, there were guys in cammo shirts and blue jeans saving people and people in uniforms looting.