I feel that a cell phone is a must when out hunting...if it works where your'e going.
If not, oh well, I still go. Either way I leave a note or tell my wife exactaly where I'll be and when I'll be home. If i'm not home by a certain hour I ask her to send out a search party.
And walkie talkies usually work short range no matter where you are so they come in handy...even out hunting alone. Leave one in your vehicle or with your wife or hubby and if you fail to return send out the search party and if your still alive at least each of you will have the walkie.
As far as going away on a remote area hunt where there is no cell service like maybe Alaska, the Yukon etc... I would rent a satelite phone for the week or two.
When ordering the post fall pizza, make sure you order enough for everyone in the rescue party, I would go with at least 10 large.
With all the deer you may have taken there holds in your memory a special place i'm sure for each one you killed.