Hoosac Tunnel, North Adams MA

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Hi /x,
Recently I have taken interest in the Hoosac Tunnel in North Adams MA and plan to explore it soon with a small group. I have read rumors of it being haunted as a result of a mine collapse, my friend's teacher mentioned it to him and told him that he explored the tunnel years ago and a few miles in there is an abandoned restaurant that was preserved in near perfect condition.
I have been doing a bit of research lately and have not found anything about the restaurant or confirmation that it exists. I would like to know more about this tunnel in order to better prepare for my trip.

So,
>have any of you explored Hoosac Tunnel or known someone who has
>does the restaurant exist and how far into the tunnel is it
>Do trains pass frequently and are they easy to dodge
>is there any way to determine the train schedule (it said on Wikipedia that the schedule is not recorded publicly)
>what is the police action like around this tunnel and how do they treat intruders

Even if you are from around the area, what do you know about this tunnel? Any and all information is greatly appreciated.