I plan on making 5 druids after I've farmed all of my preraid BiS on my primary teams. Not an optimal comp but viable for what I want to do with it. I wouldn't expect to be able to raid with 5 druids though. Most raids bring a couple of druids at most.

I'd go HoTW/NS rather than full balance. It's much more flexible and I like the idea of being able to move between any character to heal, tank or DPS. Should be a lot of fun in wPvP.