Avoid all mushrooms. I've read that many can kill, while others will make people severely sick, and identification is sometimes misleading. All this considered, I think it's better to just treat all mushrooms as off limits.

Permanent Camp
After you've covered many miles, and you're a few days into your trek, choose a location for your camp that is near a water source, like a river, creek, or lake, and offers secrecy.
Anything flanked by mountains and surrounded by forests will help.
Burn your campfires at night, and burn them in such a way that those in the towns and cities can't see the light the fire gives off. For example, build your fire behind dense brush. Don't build your fire on a barren hill.
Use common sense, geared to the situation. Think things through, don't panic.
Survival is about using all your mental and physical skills.