Fogging is condensation.
I'd dry it in a dry box, coat the exterior lenses with an anti-fogging wipe, and keep the rifle/scope combo at ambient for the season.
I do that for muzzleloaders, predator rigs, and I get good results as far as condensation, until it gets close to zero. Then one errant breath, and it'start over.


Out there doing it best I can.