Oh, you definitely have to find a nice spot for camping when you start the buggy. Funny note : the first time I tried it - I was up on that cliff in Jungle ... blew myself to smithereens!
Napalm is great because you get the initial hit - plus the ground stays on fire and if you happen to run into that - it gets you as well.
I have noticed with Black Ops that I am usually the only person in a match that uses a launcher ( to kill those nasty Choppers!! ) ... not sure why, but it sure seems that way.