GH2 is a fine camera. I've read alot of reviews of people who compare it up against some serious bits of kit.
You mentioned earlier you were going to be filming hiking, scenic trips. Stability will be an issue, or you'll get some seriously shaky footage. Even if you put it through a post stabilizer (After Effects Warp Stabilizer comes to mind) you're still not going to have a smooth shot. So, factor in a stabilizer of some sort *removed - read site rule 3* I don't use a rig, as I've not had any need for one as of yet personally. They are amazing for a follow focus setup, and especially good if you have a heavier load out (Heavy camera, external mic, viewfinder, big lens, etc etc) because it takes the strain off holding it for a long time.
Good luck!
Cheers,
Shaz