"Went With the Wind"

From Wikipedia.

Here is some more information on Carol Burnett's "Went With the Wind" skit.

It was shown on the 8th episode of the 10th season on November 13, 1976.  Carol Burnett played Starlet O'Hara, Harvey Korman was Capt. Ratt Butler, Dinah Shore was Melody Hamilton (I was trying to figure out who she was), Vicki Lawrence was Sissy and Tim Conway was Brashley Wilkes. The action took place at Terra Plantation.

There are segments all over You Tube as well.

Lots of cultural references:
Bobbie Gentry's "Ode to Billy Joe"
Tony Orlando & Dawn's "Tie a Yellow Ribbon Around the Old Oak Tree"
"Dixie" with Harvey's hilarious version of it
"Camptown Races"
Chicken of the Sea and tuna casserole

The curtain dress scene was named #2 on TV Guide's Jan-23-29, 1999 list of Funniest Moments on TV.  The entire outfit, including curtain rod, is on display at the Smithsonian.  Mattel has released a doll of Burnett dressed like that in its Barbie Celebrity Doll in 2004.

--Old Secesh