I'm in Virginia so I can't hear the CAP activity, just the fighters departing and returning to Langley. I'm curious as to whether they've had to chase anybody away and what freqs they're using. Do you have 228.9 programmed? That's often used during refueling, at least for the CAPs over Camp David.
Some tac freqs that could be used are
360.15 used during a Camp D CAP
276.6750
252.7750
242.8500
They could be using VHF for air-to-air so their UHF radio is available for HUNTRESS. Shouldn't be hard to find if they are.