This was ridiculously easy to do, documented here for posterity. I signed up for an account and they provided a chunk of HTML to be added to the web site. I just dropped it into the pages I want to track at the bottom and it just worked. One site is free, up to 3000 page views a day. I doubt I get 1/10th that.
It will be fun to see if this thing is getting read. Folks tell me they read it so I’m guessing someone does. Now I’ll know.
Instrument everything! Measure it!