Dave, Unless these cameras are different, they should work during the day. You just have to be careful to how you set them up. They need to be aimed in a direction that won't see direct sunlight . The sunlight will activate the heat sensor.
I would say this is a case of nocturnal bucks.
Hinge-cutting serves several purposes in regard to improving both whitetail habitat and your hunting experience. There are two main types of hinge cuts including a cut for screening and funnels and a cut for bedding. Hinge cuts for screening and funnels should be done somewhere between the knee and waist to block a deer's vision as well as block a travel path. Hinge cuts for bedding should be done around chest high so that there is room for a deer to bed underneath.