Dehydrating your food is a fabulous way to preserve it. Provided you have a dehydrator, you can dehydrate fruit, vegetables, and meat. Dehydration means to literally take the water out of the food. Without water, the food stays is less susceptible to spoilage. It can be eaten that way (think fruit leathers or beef jerky) or rehydrated and put into soups and stews and other meals.
I have muscle racks from Sams Club. They are so heavy duty so hold A LOT of weight for totes, #10 cans, buckets. They are adjustable and I want to say each shelf holds up to 1000lbs??? I think the racks are around $160. I have found some great prices on Augason Farms products online at Walmart and Sams Club. For #10 cans the LDS cannery has some of the best prices on pantry staples. Emergency Essentials has other items like baking powder, cornstarch, etc in smaller cans which can be nice to look into.
It isn't hysteria, and GMO isn't 'evolution'. One of the biggest issues for preppers and survival is that GMO seeds will not reproduce in the same way if the seeds are saved and re-used. In fact, in many instances (maybe all?), it's illegal to save the seeds and re-use them! It's far better to track down heirloom seeds that are native to your area and/or compatible with your climate. A good place to start looking is