FWIW - Back in the 70's I worked for a seed corn company. They did their germination tests by wrapping the seeds in damp paper and placing them in a small incubator type oven to keep them at perfect germination conditions. So for around the house type testing, I would just wrap a few in damp paper towel and set them somewhere warm. You need to keep the towels damp thru the approximate germination time for each seed. I would think you would need to test at least 10 seeds (IIRC the seed corn company used 100 per test) to get a feel for what germination % you might expect.

Storage of seed like corn is best done in a very cool dry place.

Good Luck!

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