Me to big problems... not with orinetation...just seeing the little b#stards. Getting to old.
I tend to keep the art designs to the top of the wings and use a flat colour with high contrast (read white) simple graphics on the bottom.
I don''t mix 'em up. Top surfaces arty, bottom functional.
Tend to use the same colour all the time. Yellow is the key. It's highly refective and will transmit it's colour even at distance on cloudly day's. Unlike ever all colour that will, with distance just blend into one. You don't need much and keep it on one side only.