Going in blind in the mornings, I like to go in about an hour before daylight. Take your time and don't panic. Slip in quietly and don't be afraid to take the time to stop and listen. Just turn your light off and listen for acorns falling.

A buddy and I use to do this a lot back in college. He's the one that got me using lockons for these type setups. They were definitely the best way to go.

Good luck.