Very good question about the limb rigity. I've never seen it in humans, but can guess as the mechanism (can go to the CPS if you want).
I generally only use a small dose of versed, to act as an amnestic (2-4mg), but only if thier blood pressure can handle it.
If using Ketamine as an induction agent I try to use always use Atropine, but unfortuately we don't carry glycopyrrolate.
We have a number of agents available to us, but don't carry the full gamut of anesthetics.
As sedative/induction/paralytic agents go, we generally carry: Fentanyl, Versed, Propofol, Ketamine, Vecuronium, Rocuronium, Succinycholine, and will sometimes get our hands on Thiopental. We usualy use Fentanyl/Versed/Succinycholine for Inductions, but will use others depending on the situation. Propofol on it's own is one of my preferred ways.