I don't carry a tarp or bivy or anything of that nature. I probably should. I have yet to not be able to start a fire when needed, and gear dries. I'm not saying it's right, just what has worked for me.
The most important thing is ATTITUDE. My mental state defeated me more than anything. You HAVE to have an understanding, and be prepared for what you might face. The second most important thing is education. Train yourself to handle what you might face. Practice skills like fire starting at home. Do it with less than ideal wood/tinder. A little knowledge can do wonders for your confidence. That has everything to do with survival.
"If you're in control, you're not going fast enough." -- Parnelli Jones