The hardest thing i have found with being a PvP Druid is striking a Balance with the talent tree.
Its pretty much up to your style of play, If you group alot, you will want to spend a good chunk in restoration. if you intend to PvP a lot, and do it solo, definately go with balance and feral combat.
I myself go with the lion form when i solo, it seems i cn out damage my bear form with it, and that dash command is always close at hand when it gets ugly, and oh yeah......you can track humanoids in your mini map, as well as go into stealth mode.
I know on Sargeras, the Alliance has a nasty reputation of gankin any one that is Horde, at least in the lion form you stand a half assed chance of seeing them on your mini map, even though it may already be to late if you are engaged in a mob at the time.
Dont know if i helped much, but thats what i could best offer to ya.