just point this place out on a map and ill go look for you

like suggested id go back and talk with your informant first. maybe sit down and draw out a little map of the area of what you saw and he can varify your findings with his own and you can get a better feel of what he was talking about. i wouldnt worry to much about the foilage on the trees. elk arent whitetails. they arent accustomed to looking up in a tree for danger. long as the wind is favorable youd be fine 20ft up. ground blind isnt a bad idea either. id try and find what area they are accessing the meadow from and set up just off of that to one side. stay out of the bedding areas. sounds like you have a good spot to hunt. good luck with it.