ORIGINAL: jester_s1
The advice to bag the planes is very good, especially in the South with the dirt dobbers. Humidity changes along with thermal cycling can lift your covering over time. I would unmount the engines and flood them with oil (ATF is fine) and store them in plastic baggies. They'll practically last forever like that.
Excellent advice.
I would also remove the tank, tubings and fittings, then WASH them out, dry them and apply a bit of oil, and place them into baggies.