When I have permission to dig my usual practice is to wire off excavation. I post a notice to denote contact source.
No tools are left unattended. Any rigging should be out of casual reach and require tool use to remove. Removed
soil and rubble is by direction of land management. I have built walls using dry lay of extracted lava or limestone.
Low and wet areas are often filled. My starting tools are long steel pry bar, metal handle plastic bucket(s), pickaxe,
sledge hammer, shovel, and steel measure tape. Safety equipment includes Petzl harness, Kong carbon steel rescue
with gate, Kong Micro D for tools only, length of UK made Aeris 10.7 mm by Marlow, Kong Futura, and 11 mm lengths
for equipment prusik as needed. I have the Petzl Stop, various Eight types, and more for vertical descent. Training
by ukCaving would not be my first choice.