Not saying you can't store food in an RV at all, or that food stored in an RV for a couple of years would be inedible. But the data from the USDA shows pretty clearly that temperature plays a huge role in the shelf life of dired foods, and that when that temperature is frequently above 70 degrees, the lifespan of that food plummets. And 90s and low 100s is not unusual for Colorado summer temps.

Personally, I consider it an unnecessary way to seriously shorten the shelf life of your food supply.

The tables and charts from the USDA were originally published for seeds but also applies to "dried foods" like grains, flour, wheat, rice, dried beans. So the type of food you consider stable is exactly what the USDA says is temperature sensitive and its shelf life will decrease by 50% for every 10 degrees of ambient temperature increase.

Unfortunately, all the vacuum packing and double packing does absolutely nothing to protect from the effects of temperature. Oxygen exposure is another factor in food storage, but protecting from oxygen exposure will not reduce heat exposure.

So, can you eat a can of soup that has been in your RV for 3 years? Probably. Would that can of soup had kept twice as long at lower temperatures. Probably. And according to the USDA, your rice, beans, wheat, and other stable foods have a shelf life that could be as much as 80% shorter than the same food stored in a cool basement at a consistent temperature.

As for storing things low in the camper, that might make a couple of degrees difference. When the camper is all closed up, on a 90 degreed day, the temperature of the camper floor is not lilely to be more than 2 or 3 degrees cooler than the ceiling. Unless you are leaving windows open all summer, I can't see how that matters at all.

I am not saying don't do it. I am mainly pointing out the limitations people should be willing to accept if they are going to do it. And I am the first to say, I don't consider it worth it.

It sounds like you rotate your food out often enough to make it viable. But most people would not rotate a year's supply of dried storage foods nearly often enough to do make it worthwhile.