I have a 2006 Silver Shadow and it has a small vent fan from the cabin thru to the galley. There are two round vents in the hatch area to give the fan air when the hatch is closed. I asked Chris at Little Guy if he recommended I add a larger fan in the roof and he said no. Pleasant Valley has been building them with the small fans in the wall and he figured if they weren't working for folks they would change the construction. I have only camped in it in the garage so far,

, but it seemed to work fine all 3 nights. Ask Curt to check the cabin. I see the round vents in the picture of the one you are looking at, but the interior is a bit different than mine, so I can't see the fan.
The rainy trip home from OH, there was some water that got in the cabin at the windows onto the bed and dripped down onto the storage wood. Not much, but noticable. Not sure if sealing the tiny vents on the windows is advisable, or just place a towel near each door if traveling in the rain. Anyone else?