Add a null layer, name it “camera controls”.
To the null, add two sliders(Effec t> Expression Controls > Slider Control), one named Amplitude, one Frequency (or whatever you want).
In your wiggle expression, wiggle(.5,.5), highlight the first “.5” and then pickwhip to the Frequency Slider, do the same for the second “.0” to the Amplitude Slider, and your expression should look something like this:
wiggle(thisComp.layer(“camera controls”).effect(“Frequency”)(“Slider”),thisComp.layer(“camera controls”).effect(“Amplitude”)(“Slider”))
Now you can keyframe both The Frequency and Amplitude of your wiggle expression, via the slider in the “camera controls” layer.
Note: if the controls are to course or too fine, right click the Amount (0 if reset) then Edit Value, and change the minimum and maximum to taste.
Wow, expressions are cool.