I have spent far too much time on this topic. Thankfully I devote a lot of that energy to developing games in UE of this exact nature.
Head to the airport to steal a helicopter, Stop at my house for my go bag and provisions & guns (depending on weight limitations of the helicopter) Head to the coast then steal a sailboat… Preferably a catamaran for it’s loading capacity, internal volume and stability.
My immediate family know this is the plan in most SHTF situations.