This is my bear blind set up for the last few fall seasons.
As can be seen, there is a rocky step behind (not uncommon in the Granite State) which restricts movement from behind.
It's 12 yards from the barrel and set up crosswind for the most common down draft thermal. Experience has shown me that directly down wind results in getting busted since most bears will scent check from there before coming in.
Pop up blinds allow a comfortable chair, effective use of a Thermacell when mosquitoes are still abundant in early season, some scent blocking with dirt and leaves pushed against the interior skirt, and the ability to see underneath the thick hemlock growth where this is located.