Full moon and hot, dry weather can be extremely tough. Elk may only be active super early and late in the day. If you hunt during mid day you may spook them out of their bedding areas. If you are hunting an OTC unit with lots of orange it may make a tough hunt even tougher. You never know what will happen but can be some super long days twiddling thumbs if the weather is warm and dry. With that said, if you luck out with cold, snowy weather it may not matter as much.....especially in a limited unit with fewer hunters.