How much would your moral compass slip in a life or death situation?

Here is the situation; you are on a vacation at a resort/retreat etc where you are in a remote area. There is word on the radio that imminent doom is at hand you can decide what, but it is large enough to encompass the whole area Everyone got there by helicopter because that was the quickest way; the roads are narrow and tedious to travel by vehicle and certainly not fast. There are only two vehicles available and they can only carry maybe eight extra people. There is a helicopter there delivering supplies. The three-man crew says they can carry only eight people due to space. Staying there at the resort are you and your (spouse and another person very dear to you, siblings, kids, etc), a woman with a toddler, an old man and woman having an anniversary, a frat boy and his g/f, a family of five with a baby and two small children, and five members of the hotel staff. When dust settles, only four people will not have a way out. Those who try to drive out will have a 30% chance to escape the doom. How bad would you work to be sure, you and yours were on the helicopter and would you throw anyone under the bus to make sure you and yours was a more logical choice to take other than them? If you stay, your chances of survival would be 8–12%. Would you lie, sabotage any of the others chances, resort to bribes?