Boondocking and vent fans

We purchased one of these several years ago as they plug into a 12v gig lighter inside and can also be used outside if the same type of lighter connection is available in a storage compartment. Is variable speed and is smaller than a regular box type fan but does move the air. Might also consider buying a 12v extension card to use if/when needed. Amazon/Ebay might also have these available.

http://www.campingworld.com/shopping/item/fan-tastic-endless-breeze-12v-fan/38132