A vertibird crash site not far from the take off site. Add a couple of notes why it crashed (carrying important ppl, chinese sabotage... blah blah blah). A small encampment not far off from the site (like the Sniper's Nest in FNV) with the skeleton of a guy with a unique vertibird blade sword next to it (like that nightkin companion, i forgot her name). Alternatively, add a note there as well and let the players follow a trail of notes to some random obscure site with the skeleton of the guy and the sword. But if you are pressed for time just leave the sword in the encampment. Also add a note how the guy came across the blade. Or not. But adding those tiny details make a huge difference in the player experience. It goes to show how dedicated you are to the mod :D ALTERNATE: Place infested by FEV mutants and everyone is carrying a Vertibird sword. Though this makes sense, it sort of devalues the uniqueness of the vertibird sword model. Enemies can be anything. But it should make sense. If it is close to the water, Mirelurks would be a good idea. Otherwise, raiders or something to that end will also work. That's pretty much about the environment. Except adding aircraft carcasses, but I believe you already took care of that. Also give it importance. An aircraft graveyard is unlikely to have a hi tech bunker attached. Make it a covert research lab or some other s***. Don't forget to connect it with some quests (like the Boomer quest where you need to hunt for stuff at HELIOS). A desolate graveyard would be perfect for scavenging quests.