I don't think that there is anything to get too wrapped around the axle about 3585. As a couple of folks pointed out, it occasionally came up going into some of our old out-station uncontrolled fields; BLF, BKW, RKD, AUG, BHB come to mind. I was based in BKW and HYA. Used 3585 less 5 times in almost 4 years. I think once in the year I was in HYA when we were late out of LGA and HYA and ACK were closed.
Keep in mind there is a reason we carry an FOM...VERY, VERY few things do you need to memorize out of that book, but you DO need to know where to find the information if you need to question a release. The old "Ch. 7" (Winter OPS) was an important section to have a good working knowledge of, but know we have really good in-flight guide that contains all
that and more. So-called, "fingertip" knowledge as one of our old managers called it.
Regards,
ex-Navy Rotorhead