there really isn't much of a ground war going on in AH. For the most part its just a spawn camping war. A few of the maps will have a battle ground or two, minadao has that one base north of A4 that is alway fought for, the island map has the "tank town", but thats about it.
Spotting the enemy is the key. Finding a spot to sit in with your engine off looking for tanks to roll in is the way to do it. Hitting a tank between the 1st and second, or second and third wheel for the kill shot is the best place to hit.
Most people will take a direct route from a spawn point to a base, and sitting along side of that route in a clump of trees is a good plan. Another thing Ive seen done is to bomb a VH to kill it, bail from your plane, up a GV and race to the spawn point to wait for the VH to reopen. This way your in place waiting for the spawner to become the target, which is what may be happening to you

Some of these guys make an art out of spawn camping, but to me its like vulchin, and doesn't really take much skill. The guys that impress me are the ones who move around in a TT and get kills, and survive.