I've a lvl 30 druid, leveling quickly and enjoying it. Full feral at this point. I've mostly been trying for Agi, Str and Stam gear. Is that a good direction for a feral druid?

Also, as I approach doing more instances, SM and ZF, etc I may do some healing. Should I also be building a +healing/Int/Stam set. Or is it something just not to worry about for those low level instances?

At 30, I would start to hold on to items that might make up a healing set. I wouldn't spend any gold or really farm for stuff, but just be a little more careful about what you vendor or DE.

As you get to the higher instances you will need to heal from time to time, having some good healing gear makes it much easier.

Good, that's exactly what I've started to do, when I get some good +Int/+Spi/+sta stuff, I just tuck it away. I need to get one of those mods that change my gear on the fly now.

Look for one called Itemrack