It all depends on what stand it is. If its next to where their feeding. I try and get in about an hr so I reduce my chances of bumping out deer. If it's back by their bedding area. I get in around 30 minutes before light. Theres a lot that should steer you to the right time to get in. Whether and location. Bumping animlas will happen during morning hunts. I used to think my morning hunt was over cause I bumped some deer in the dark, but soon learned that's not the case. Just my two senses.