Find as many out of the way - park or backwoods places as you know of and plant one or two there.<<<
Yes, I agree with your idea and would do so even here, if I could still go out of the house.
There is a movement on, people are going far into the forests and planting food seeds, all over the country and in England.
I know that a lot of folks are planting any vacant land they find, some do well and can harvest it, others wind up in trouble, for using land they don’t own.
I hope that every one saves every seed for food they get their hands on, for themselves, for already shortages of some seeds are in the catalogs, for trading stock, to share and trade and to plant in any spot they might grow.
When we drilled our well in the Yuma desert/Wellton, Az, I served watermelon to the well drillers, they spit out the seeds and I had a watermelon patch for 6 months, until Christmas day when we ate the last one.
What most people don’t know is that in many places, there is a sort of universal easement that goes along with the public roads.
Something like 15 feet from the center of the road on both sides.
There are areas near me that they have to come out every year with the clipper thingies and trim the brush growing along the road.
Very good places for taters and carrots!
And I got a bazillion seeds from last year.