When things kicked off in Vietnam, the USA had 6 aircraft carrier strike groups:

USS Constellation (CV-64)

June to August 1964
May to December 1966
April to December 1967
May 1968 to January 1969
August 1969 (then to Defender Station in Sea of Japan)
On Yankee Station from November 1969 to May 1970
October 1971 to July 1972
January to October 1973

USS Enterprise (CVN-65)

Six six combat deployments to Southeast Asia from 1965-75
Return to Southeast Asia in Spring 1971
On Yankee Station from August–November 1971
On Yankee Station from October-December 1972
January 1973 - strikes on targets in Laos
April 1975 - Operation Frequent Wind

USS Hancock (CV-19)

On Yankee Station, November 1964 to Spring 1965
December 1965 to August 1966
Early 1967 to July 1967
November 1970 to May 1971
March 1972 to ??

USS Oriskany (CV-34)

May to December 1965
On Dixie Station 27 June 1966
On Yankee Station 8 July to October 1966
On Yankee Station July 1967 to January 1968
Return April 1969?

USS Ranger (CV-61)

Joined TF 77 in October 1964, till April 1965
January to August 1966
On Yankee Station, December 1967 to April 1968
Return to Yankee Station 11 April to 5 May 1968
October 1968 to May 1969
October 1969 to May 1970
October 1970 to March 1971
December 1972 to August 1973

USS Ticonderoga (CV-14)

August 1964
On Dixie (later Yankee also) Station November 1964 to March/April 1965
November 1966 to April 1967
January to July 1968
March to April 1969
On Yankee Station May to August 1969

I would think we would need at least 5 or more strike groups if we are to attack the Norks....