RE: Dark to Dark Hunting
It seems to me that the value of this strategy would depend a lot on circumstances. For example, if the wind changes direction between dawn and dusk, it might be a good idea to change to a stand where the wind does not favor the deer.
Perhaps the point is the writer advocates hunting the whole day -- using whatever technique and location is most appropriate under the conditions: changing stand location if the wind changes, perhaps still hunting bedded deer in the mid-day, attempting to cut and follow tracks if a snowfall occurs in mid-day, etc. Hunting all day mayincrease chances of bagging a deer, but not necessarily linearly (double the time afield may not mean 2 times higher probability of success). Another consideration is that if you are succeeding by hunting 2 hours in the morning and 2 hours in the afternoon . . . what more can you accomplish by remaining afield 10 hours? Success is success!
On the other hand, if you are hunting an area with significant hunter presence, a hunter remaining in his stand all day long may enjoy having deer pushed to him by other hunters getting in and out of their stands through out the day.
One thing to remember, though, is deer hunting is supposed to be fun. If sitting in a stand for 10 hours a day is not fun and you are having fun NOT staying in the stand (that is, you are enjoying your hunt and accomplishing your objectives -- whatever they may be), than definitely get out of the darned stand!!!