I've been flying for a few years with a Phantom 2. I've always been nervous to fly in a way where there isn't at least some kind of clear path between the Phantom and my remote. I know this might be a dumb question but...what exactly can disrupt the signal? Like I know it'd be dumb to fly on the other side of a giant building...but all my flying is in nature. Say I'm down in a heavily wooded area and I fly up and a few thousand feet over in one direction. Is there a risk of the trees blocking my signal?