Hey MR,
At full strength, a Very Heavy (B-29) Wing had 180 Aircraft assigned into 4 Groups of three squadrons each. Therefore, a squadron consisted of 15 aircraft.
Operationally, putting 12 planes in the air was probably pretty realistic.
As far as personnel, a wing was 12,000 men, which works out to about 67 guys (11 aircrew and 56 support personnel) to put a Superfort in the air!