Well I am gald you were interested gypsychic. I keep all of my meat in a styrofoam cooler I have had for almost 2 years now, it is the type that is smaller but thick and very efficient. They usually use them to send food through the mail, like steaks. I see them a lot on the free section of craigslist btw. I got mine from some people who had ordered streaks. I also, at least 6 months out of the year don't have to worry about much becasue it is pretty cool here(i.e. veggies, fruits, milk and eggs.) Thinkgs like milk, yogurt, sour cream , cheese and eggs don't spoil quite as fast as you would think. You beging to learn the turing point on things and it becomes second nature. In the summer, I have to use a larger cooler and hope I can afford ice for the veggies, usually no big deal. I always use the little cooler for meats. It looks like a two year old styrofoam cooler, but I figure even if I use it for years it will still be here for a million years or whatever so I like to reuse as many times as I can. DO NOT USE THIN STYROFOAM COOLERS FROM WALMART>>>NOT THE SAME THING!! Sorry for yelling but I mean it.
I have a fairly decent sized pantry about 2'x2'x4'. Also some shelves. I like to keep a solid store of food just in case. This includes things like canned goods, pasta, sauces, spices etc. The veggies and fruits I keep out most of the year like you would in a house, but in the summer you gotta eat quick.
You mentioned what a person would do with soemthign like 3 lbs of blueberries...well, I share with my wife of course, but also my firends if I can. ALSO, learn to preserve things like this, make jams, jellies, preserves to put on ice cream. Get creative. The best jam I ever had was some local plum cherry jam that someone I know made. Think about what our grandparents did, they made preserves, had iceboxes and used wood stoves for heat...living in a van isn't that different.
You also mentioned the shape of boxes, well say for your rice, quinoa, cereals, lentils and other dried goods you can use plastic containers, they sell them at a lot of bigger stores, where I am at Fred Meyer has tons of different shapes of boxes and bins. Not just tupperware style, but many are shaped like cereal boxes and have pour soouts, they work the best IMO.