You don't need to pack food for 14 days. Pack just enough to get you through the first 3 or 4 days, then purchase and resupply, This keeps you from having to pack a bunch of stuff and have no where to put it. It also keeps the food fresh as you use it up before getting more. Plus, you may change your mind about a meal or two and decide to eat out, or just have a "pig-out" if you are somewhere, eating snack and such instead of a regular meal.
On the other hand, take enough clothing for the full 14 days so you do not have to waste time doing laundry. Do laundry once you get home.
Take "some" cash and don't depend upon your Credit Card or Debit Card exclusively. You never know when you will want to purchase something (like a soft drink or a bag of chips) and using a Credit Card for a $1.50 transaction just doesn't make sense.
Make sure you have a contingency "slush fund" in the event of mechanical failure. That could be readily available cash, available credit on your Credit Card, or a VERY good balance on your Debit Card. Plan for the unplanned. Money will fix just about everything if you have it available. Have the "slush fund" available, and hope you don't need it. When you get home if you did not have to dip into it, keep the "slush fund" for the next trip.