"Should I just give up mine exploring"
No, but I'd recommend looking as much like a walker as possible til you disappear down whichever hole it is you're off in. Getting changed in the carpark at Nenthead is accepted and a normal sight for the locals.
Other landowners are not always so accommodating and if you don't have permission to visit changing into bright yellow overalls on the roadside only attracts suspicion.
A few years back somebody stole the headframe from No 1 shaft at Groverake and cut it up for scrap, the buildings have been completely trashed by vandals.
The scrap thieves were caught because someone was suspicious and called the police.
If you park up and go down there looking like a walker with a camera round your neck you're far less likely to attract attention than if you're in overalls carrying a tackle sack.
This advice is more aimed at other explorers, perhaps new to the area than you Pete. I guess you've figured that out already. :lol:
There are 10 types of people in the world.
Those that understand binary and those that do not!