Define "cover"?
On smaller diamater trees I like to get where there are leaves, branches or neighboring close proximity trees, to break up my outline.
On big diamater trees, where they are wider than my slihouette, I've not had to have anything else around me, yet the deer act as though I'm invisible.
So is "cover" just something behind you wider than your shoulders or is it more of a wrap around break up?
I think it to be both, but that both are not needed, depending it seems on the type of tree by dia. one uses.