I had a somewhat similar situation a year and a half ago. Except it was pitch black and I was 10 feet from my stand.

I heard 2 entities moving, by the amount of noise I assumed they were deer. I quietly slipped down beside a fallen tree and froze.

I heard them slowly moving closer to me and guessed they got within 10 feet and one must have sensed/smelled me and started snorting and pawing at the ground. After about 30 seconds (seemed like hours) they took off running.

2 hours later a buck and a doe came right back in towards me from the direction they had run towards. I can only assume it was the same deer. They're curious animals, they like to know what it was that spooked them. I've shot a deer in a group and had 1 or 2 of the group come back to within 50 yards of me while I'm dressing my kill.