NOTE:-This works best in CTF when on the red team.-

On the map "Bloody Gulch" there are small dirt paths going up against the hill sometimes indicating to a cave. Now, jump into the Rocket Warthog and get a passenger (with a sniper rifle) and a gunner. Then, look for the entrance to a cave (hidden behind big rock) and drive in. Go to the place where the Flame-Thrower is and tell your gunner to take the over-shield (he'll need it!).

Now comes the tricky part: keep driving along the ledge towards the Blue Base and drive through the next cave. Stop your Warthog on the ledge where you overlook the Blue base and order your gunner to "snipe" as well as your passenger. The only disadvantage is that the enemy might have a sniper hidden somewhere (this is what the over-shield is for!). Now, you can pound the base with rockets.

This is also a good defense point; when the an enemy is trying to enter your base and steal the flag, BOOM! pound him/her with rockets!