But otherwise, if my Bowmen want to shoot out from the woods, they must be no more than 1/2BW from the edge & so do not receive any benefit from cover? Just checkin'
The bow element 1/2 BW into the woods would still be in bad going, and since they are bow, do not get a close combat penalty for being in bad going, so certain elements (like spear), want to get into close combat with the bow, would suffer a -2 CF.
If the bow wanted full cover from the woods, say from being shot at, would then have to move more than 1/2 BW into the woods, but then they could not shoot either.
I hope this answers your question, but if not, somebody will correct me