I wouldn't get too excited about the number of beds. Especially in the summer, I've watched a lot of deer pop up out of tall grass. Around here, they seem to use those areas when there are a lot of mosquitos. I've seen too many deer get up out of a bed, feed a little while and lay back downin another spot. The fact that you've got beds there indicates you've got deer habitually using the area. You may a few deer making a lot of beds. Hunt it carefully, it won't take much disturbance for them to go somewhere else