That would be even better, but of course that the US had planned to reinforce Wake to that extent, but could not without further construction. The infrastructure for a composite air group was not ready. A emergency insertion of a small fighter group may have been possible had the will existed.
With twenty to fighters operational on the island continual CAP may have been practical for a week or two, which makes the Japanese air raids a lot more problematic. A handful of strafing attacks on the first invasion flotilla wrecked havoc. A dozen aircraft strafing the landing force would compound that.
Could Hermes refuel from US Navy tankers? I think the IJN and the USN used different refueling techniques, for one. Did the USN and RN use the same technique, and equipment? I don't know what Hermes' range is; would she even need refueling on the trip from Oahu to (near) Wake and back?
Hermes would need escorts, including another carrier I would think. What is the earliest that Hermes could leave for Wake, in this particular scenario? She might have to sail with the relief force.
The Hermes would not need to refuel on that mission. Destroyer escorts would. That was one of the issues with Fletchers attempt to assist Wake island. As for time, that would have to be traced out to see if this idea is practical.