2002 Burnt Oil Smell and Smoke from Engine

[dvdsprrr]

Hello
My wifes 2002 blue tBird if not driven for 5 days or so - has smoke and oil smell from the driver side of engine. If I open to hood you can see the smoke. Not alot and goes away quickly. I think somehow oil is getting on the exhaust pipe and simply burns off --- but I cannot see the exhaust pipe or the valve covers.... Anyone have this already. 5Star Ford(AZ) wanted $1200 to replace the valve cover gaskets - Sanderson Ford ran a red-leak detect and found nothing. Anybody have suggestions? No oil leak on garage floor -- oil level OK. Rick