I have read "Killer in the Bush" which is a good description of the fires, but it leaves out most of the details of the dead. I did find the local paper in Shelburne ran a series of articles on the deaths of individuals with ties to that region. They are very detailed and if you are interested I have put the account for Margaret here:
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=mc...;
If memory serves me correct I believe I was told that there is a Hillcrest cemetery by a person at this organization:
http://www.nt.net/~timetrav/#statsThey were not very forthcoming with free information, but if you can afford their references maybe they would have answers about Hillcrest. Or maybe you will have better luck communicating with them than I did.