Food stocked is fine for the immediate future but the end result is the food will run out. So start thinking along the lines of getting back to earth and what she can do to fix your situation on a long term basis.
Buy Seeds.
Plant and grow vitamin rich vegetables and fruits. This will sustain you long term.
"Give a man a fish and he will eat for a day"
"Teach a man to fish and you feed him for a lifetime"
Ampgod