I used to take my old 91' F150 2WD everywhere. Mud, sand, grass, you name it. I wouldn't want to try rock crawling wit it obviously, but it gets you where you need to go.
X2 on the less stuff to break. Of course, its a chevy, so they overcomplicated things anyways. Still, just throw a camper shell on the back, fill it with gear and you're good to go.
If you have the opportunity, take your 2wd out to an open field somewhere and see just how far you can push it. That will give you some idea about what you can expect of off-road travel with it.