@SimonJMBrown 

More Backup - Very Good Idea!

But you have one more undocumented option, you can use the VSS (Volume shadow Copy Services) when the HOST is an Windows.
I use this Option as long Time ago. Create a new Task scheduler:
wmic shadowcopy call create Volume=c:\
wmic shadowcopy call create Volume=d:\
you need only "C:\" your VMWare data are stored on "C:\"
Run on Fixed Times (As Logon User) and on Startup (As Lokal-Admin)

So you can very fast get a Restore of any missing Data..
see attached Pics