Over at GitHub, in case anyone's interested, there is a Camera Shake script written in C# that is the most sophisticated script I've found so far. And of course, if you change line 23 to ScriptPortal, the script works perfectly!!
I love the fact that it includes a User Input menu. I miss that feature on many scripts and I'm just learning how to add those, so it is nice to add this to my list of C# scripts that actually work.