Now I can say conclusively that they're sleeping bag dryers! :-)

Virtually every plane, in front of every tent, at every campsite in OSH had
a variety of items hanging from the props this year. It was the first Osh
I've ever attended -- and we've been there a bunch -- where it rained every
day.

Not a lot, mind you -- just enough to make you watch the skies warily
throughout the day.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"