My wife and I are headed that way 9-10. I got on line and purchased our tickets by going on line to the plant. You can then print out your ticket and here is what is says:
Closed toe shoes (NO sandals)
No cameras
No cellphones
No children under 7
No backpacks, purses, fanny packs or other containers may be brought into the plant, except for medical reasons.
If you don't mind staying about 10 miles up the road at exit 38 the Bryce Inn (270-563-5141, is owned by a Corvette couple and the rate is only $53. Those that are closer, Hampton, Baymont etc. are over $100.
Good luck....