I’d almost certainly suggest using /usr/local
.
Globally accessible user scripts can be placed in /usr/local/bin
. Small amounts of associated data could also go into bin
. Or you may wish to separate out the data into /usr/local/var
or /usr/local/share
.
By doing this you’ll be quite sure that anyone FHS familar will be able to locate them pretty quickly without any prior knowledge of the particular system.