You can contact someone at one of the sites with questions:
Hill Cumorah Visitor's Center
653 NY-21
Palmyra, NY 14522
Phone: 315-597-5851
Directions
Smith Farm/Sacred Grove
843 Stafford Rd
Palmyra, NY 14522
Phone: 315-597-1671
Directions
Book of Mormon Publication Site
217 E Main St
Palmyra, NY 14522
Phone: 315-597-5982
Directions
Peter Whitmer Farm
1451 Aunkst Rd
Waterloo, NY 13165
Phone: 315-539-2552
Directions