Many leading experts believe that the daylight/night ratio is what triggers the rut. The duration of sunlight passed though the retina...etc. more to the point of your question, I haven't noticed much difference except you can walk to your spot before light without a flashlight easier on a full moon. For a few years I was convinced that elk fed more with more moon and therefor bed down earlier in the morning. While there is likely some truth to that ie. (If the browse is easier to find they fill up sooner and need to bed to digest) your hunting strategy should adapt to the information you gather in the field. If you plan to ambush them between food/water and bed, Its good to know what time they move. All the advise in the world won't change these facts; elk need 1. Food, 2. Water 3. Air. Find the first two then take away the 3rd.