I do not know which cemetery it is but most want to charge for the information. I suggest that you only give them one or two name at a time or ask where to plots is located and then come back to the office and ask about others and maybe since you are there they will give you more. Most will tell you where the plots are but charge for the interment information. So take a camera and from that you can look up death cert numbers and order them from the LDS. Also take a notepad and pencil to write down the information aa it is hard to remember it when you get home and it will help to know who is where if you do it by plots and photos. St John's is the cemetery where most of ours are residing and where we got our best information to get started on ours.
If it is St John's Cemetery unless they have gone up is $40 each plot I believe and some of the othere ask for perpetual care back payments but you do not have to pay those to get the interment listing.
Hope that this helps.