There is a good way to determine this. I have used this method for the last 2 seasons. I will put corn out in a remote area where I feel deer are traveling. I only put out enough corn to last maybe 1 feeding visit. I leave my cam there for 2 weeks. If I go back and have pics of deer only while the corn lasted, and the rest of the days have no pics, I can very well assume that they were only there for the corn, and this is not a good travel route. If I put out the corn and have deer pics even after it is gone, I have found a natural travel route. Pretty simple. Now, as for the crop/mast changes, that is a given that the deer will usually change routes as these food sources change. Not saying their overall pattern will change, but at some point when leaving the bedding area, a short distance away, it will change. I have noticed that deer normally enter and exit the bedding area on the same route year round. But when they get a short distance away, the trail changes to meet where the food is.

Just my 2c.

LT