What about Wanlockhead? When the museum is open (Easter onwards) you can purchase a permit by the day, week, or whatever, at fairly modest cost. They also have pans, instructions, etc.
No more than 3 or 4 hours drive from Manchester, but it might be better to stay overnight. Google will find you some accommodation.
There is the museum, mine (a bit simplistic for most people here), miner's library and cottage to see, as well as lots of surface artifacts, and a narrow gauge railway at nearby Leadhills, plus the highest golf course in the country. Oh, and the food in the museum cafe is very nice.
Alan