They make an automatic and a electric. The automatic does retract in rain or high wind. The electric is manually controlled but a motor runs it in and out. On the manual awning (at least the ones I had) there is a bar just below the awning from the trailer out to the "roll" that the deflappers hook to. On an electric that bar isn't there, there isn't anything to hook to closer than 2-3 foot.
Clif and Millie
Ozzie (half a dog tall & 2 dogs long)
2009 Ford Lariat F350 SRW CC
2013 Cruiser CF305SK Patriot Edition