CindyinSD
All will be well, and that will be well is well.
I wonder whether you could cover the ground with something like this? I believe water will seep through it. It's not the fragile stuff you can buy at the local DIY stores. I don't know, though, whether piling gravel on top might not tear it... They're out of stock, but you can call and ask your questions & when they expect to have more--if you think it might work. I do think it would keep the earthworms, etc. underneath.
https://www.growerssolution.com/PROD/dewitt-ultraweb-3000/ultraweb3000
https://www.growerssolution.com/PROD/dewitt-ultraweb-3000/ultraweb3000