Good to let him sit over night. Last year, same thing happened to me. 15 yard shot right at dark and hit a branch which sent the arrow into the guts just forward of the hind quarters. No pass through.

I went out at night two hours after dark though with a friend and we jumped the buck out of its' bed so we backed out of the woods. Hope the arrow breaks off so the entrance wound has a chance to leak.

Found him the next morning 200 yards further down the trail. Glad we backed out immediately when we bumped him.

Good Luck!