That's fine for targeting and healing, but I won't get all the buffs from the totems.
that's right ... there's not much you can do about it. I've leveled in AV from 68 -> 79 (will hit 80 x5 tonight) and the only 2 options are :

1. accept the BG right away and hope you have time whisper the RL asking for leader or assist so you can move your toons to group 8 before a spot fills it (there's a good macro in another thread for this)

2. The BG invite stays up for 60 seconds before disappearing - wait until the last 5 seconds or so before accepting the invite. The idea being that the raid will fill up and it will slot you in group 8 automatically.

During peak times, option #2 is slightly better as the queues are pretty quick and the raid is more likely to fill up before you accept ... during off-peak hours, #1 will get you better results. Neither works well with any consistency.