From: Ringer Spy TaniwhaOkay, I wasn't going to tell you guys about this in case I got busted somehow, but I was in the shooting of Helm's Deep on one of the 'Riding the Shield' days (Legolas hanging ten), but I'm not going to tell you where in the shot I am.
BUT: The call sheet for Helm's Deep that day was titled "The Death Of Haldir"…only I didn't know who 'Helldeer' was (I only heard them talking about it), just that he got whacked by an Uruk hai before Aragorn could save him. So yes, he's at Helm's Deep, but I'm not sure how long he lasts…naturally, I was already LONG since dead in the shot, like all the other elves.