Im going on my first western hunt but am not new to living in the woods for a while (military). I will also have a partner with me(my wife who is a newbie). We are not going to be particularly far from our car. Our camp would be about 4 miles in with a days hunt going a little further from there possibly. Should I buy some sort of unit with an SOS feature? If I was alone, I think I would definitely buy one but seems like with a partner, he/she could hike to the car and contact help quickly enough. I know it better safe than sorry but what do you think? $400 is a lot of money. How many of you guys use one if you have a partner?