When SHTF you'll want solid entry-point re-enforcement if your bugging-in. Make sure you have long strike plates for the deadbolts (with 3" screws which will go past the weak 1" pine wood through the 2x4) and I'd also consider buying and installing a katy bar too. Another measure (to make your door batter-ram proof) is making sure the door is covered with sheet metal on each side. Pilot and screw a long steel weld to the "frame" (the front of your door jamb).