I was an EMT-B there several years ago. You get a paperwork bonus on top of your normal hourly. Which means the paperwork you submit to corporate needs to be filled out accurately.
Their orientation is very good. If you've never driven an ambulance before be ready to do so through an...
DO NOT wear "ride-along" attire. Wear business casual clothing as stated prior that are comfortable.
That's your future employer (hopefully). You don't want to look like a bum.