Welcome Elexander from western MA. Since the ground is rock hard, I would recommend two things. The first would be to use this time for research. Talk with folks in town, visit the library, look at old maps, or just take short walks around and find some sites for when the ground is softer. Second tip is to try and find places that the ground is diggable, like river banks, shallow water hunting in ponds, or any other place that water flows. Good luck and I hope you get out soon.