I have a pair of these things I install real quick when I'm in tight areas. They simply install by suction cups, and are like 25 inches long by 6 inches wide.
I keep them under the trunk mat and whip 'em out when needed.
Seems like the perfect solution for overnight parking in a cramped parking lot.
http://www.autoanything.com/garage-a...Fc6DQgodJVcARQ