Whenever possible, you should go hunting with at least one partner. Together, you and your partner can watch out for one another. If either of you should have an accident, the other can assist the injured party or go get help. Without a partner, you're left on your own. Something as simple as a twisted ankle can quickly become a life-threatening situation under the right set of circumstances.
It's doubly important to work with a partner if you'll be hunting in unfamiliar terrain. Together, you stand a better chance at navigating through the area and having a positive hunting experience than you would on your own.
If you enjoy hunting as a solitary experience, at the very least, you should tell other people when you're going out to hunt. Let someone else know when and where you'll be hunting. You should also establish a time when you'll touch base with that person to let him or her know you're fine after your hunting trip. If you suffer an injury, you don't want the added dangers of being caught outside without anyone knowing where you are.