I'm down for this.
I'm glad you re-read ;) You had me panicking thinking "HOW DID I LEAVE THAT OUT!? I SWORE I MENTIONED IT" *frantically rereads*
Though if anyone else has some questions on the locale,
Binh Dinh is along the eastern coast of Vietnam. The 1st Cavalry Division moved there in 1967 to take part in Operation Pershing, which was basically a load of heli-raids against NVA and VC targets, from what I can gather. Although there was a heavy U.S presence in parts of the province, VC and NVA activity was rampant.
Edit: Ideally, I wanted the players to be on foot and all survivors of the crash - cut off from outside help.
Of course, the U.S will probably scramble a rescue mission as soon as the survivors make radio contact, but there is a large and undefined NVA/VC presence in the area, so their response may take time. Unless they go all heroic and launch a full scale attack, which is perfectly possible.
If you're happy to wait for the RP to get underway, I can include you as part of the rescue effort - although that wont be until the group have moved away from the crash site, and have radioed for help.