RE: colorado 4th season, full moon question?
There are a number of factors that may improve your chances for success. Where are you hunting and what type of terrain will you be hunting? If you are hunting an area with lots of open pj/sage country it probably won't matter as much as a unit with dense pines or oakbrush. If it is warm, full moon, crusty noisy snow it may be a nightmare.
Hunting pressure may also impact when the bucks come out of hiding. If the unit was open for OTC elk and the bucks have sensed much hunting pressure they may not join does until night...and head back to the trees by daylight. If you are lucky and there are overcast skies, cool weather, and lots of snow it likely won't matter as much.
If it were me and I had waited 15 years for a tag I would likely wait 1 more year that isn't full moon. That's just me and the unit I like to hunt that has a lot of pockets with thick, dark trees and relies on migration. If I was hunting open sage in a unit with resident deer it wouldn't matter.