Prepend your wrapperscript in /etc/pm/sleep.d with a low number e.g. 01wrapperscript,
so that it's called at the end.
How did you disable your touchpad in the first place?
Maybe it would be more convenient to disabled it through X with a configfile in /etc/X11/xorg.conf.d.
If you're using the synapitcsdriver just copy /usr/share/X11/xorg.conf.d/50-synaptics.conf to
/etc/X11/xorg.conf.d and insert the line
Option "TouchpadOff" "1"