You are in southern Illinois,, so it does not get mighty cold, compared to were I'm at. It may work, during winter, You don't want your food to freeze,, like potatoes, and other root veggies. If you will keep meat,, I do think that needs to freeze though.
The other main thing of concern,,, is rodents getting to your food before you do. You can get rodent proof containers, but that is also a challenge, since common metal cans are somewhat high, and do not provide good ventilation when closed.
If you get your container issues solved,, then you need to monitor the temperature inside that crawl space for at least a season before actual use. Get one of those indoor outdoor clock/thermometers. Locate the outdoor sensor in the crawl space. This way you can monitor the temperature there from the comfort of your home. Then make the decision when to start storage ,, and when to terminate storage.
In summer, your crawl space will be quite warm.