Helicrashes, Cargo Drops, and Roaming Traders can all be placed into your level by simply dragging in their spawn point. Though you can still mod their parameters, which are stored in a separate blueprint
Find tthe Helicrash spawn point in Blueprints/Gameplay/GameplayEvents/HelicrashPoint.uasset
Move it to the gameplay level, then orient the crash and spawners according to level geometry. Don't forget to make sure that the reward crate doesn't spawn in the ground
Now you have setup a potential spawn point for the helicrash event!
Find the Airdrop point blueprint at: Blueprints/Gameplay/AirDrops/AirDropPoint.uasset
Place it into the gameplay level, and that's it!
Find the Roaming Trader blueprint along the path: Blueprints/Gameplay/GameplayEvents/RoamingTraderPoint.uasset
Place it into the gameplay level, and that's it!