I don't see any way that this is allowed in the rules, but it would make a huge difference in scenario 1 and it at least makes some logical sense (if not rules sense)...
Am I correct that you cannot "throw" an Explosive Orb through a tent-flap/door you are adjacent to? Same question with the lightning spell. (Logically, this would be easy to do, but I don't see how vis-a-vis the rules).
See thread 1653083 for all the gory details.
Summary: hut flaps block all LOS (spells, orbs, and, depending on your carrier, possibly also mobile phone signals).