This week I have an episode all about How to preserve fruits and vegetables. The last episode was all about How to preserve meat.
Many of the same techniques work for both. You really need to find the method that works well for which item.
Canning works great for meat to make a stew with but will turn some softer veggies into mush.
Some methods of preservation work better than others and some are easier.
Free dried foods will last the longest. But Freeze drying at home is all but impossible unless you have 30k to spend.
In this case, I say buying freeze dried foods is best not trying to make a DIY rig at home.
Fermentation works great and can have added benefits for both gut health and to fight off scurvy.
With ferments like sauerkraut without canning, you can expect it to last up to 6 months. With wines and distilled alcohol, it will last forever.
Freezing is the quickest and easiest method available. While the grid is still up, take advantage of this method. If the grid fails you will need to consume the frozen goods or preserve them another way.